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Iterating Over a Bitset in Java

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Iterating Over a Bitset in Java

Take a deep dive into optimization and iterating over bitsets, with some intense benchmarking along the way.

· Java Zone ·
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How fast can you iterate over a bitset? Daniel Lemire published a benchmark recently in support of a strategy using the number of trailing zeroes to skip over empty bits. I have used the same technique in Java several times in my hobby project SplitMap and this is something I am keen to optimize. I think that the best strategy depends on what you want to do with the set bits, and how sparse and uniformly distributed they are. I argue that the cost of iteration is less important than the constraints your API imposes on the caller, and whether the caller is free to exploit patterns in the data.

C2 Generates Good Code

If you think C++ is much faster than Java, you either don’t know much about Java or do lots of floating point arithmetic. This isn’t about benchmarking C++ against Java, but comparing the compilation outputs for a C++ implementation and a Java implementation shows that there won’t be much difference if your Java method gets hot. Only the time to performance will differ, and this is amortised over the lifetime of an application. The trailing zeroes implementation is probably the fastest technique in Java as well as in C++, but that is to ignore the optimisations you can’t apply to the callback if you use it too literally.

Compiling this C++ function with GCC yields the snippet of assembly taken from the loop kernel:

template <typename CALLBACK>
static void for_each(const long* bitmap, const int size, const CALLBACK& callback) {
    for (size_t k = 0; k < size; ++k) {
        long bitset = bitmap[k];
        while (bitset != 0) {
            callback((k * 64) + __builtin_ctzl(bitset));
            bitset ^= (bitset & -bitset);
        }
    }
}


The instruction tzcntl calculates the next set bit and blsr switches it off.

.L99:
  movq  %rdi, %rcx
  blsr  %ebx, %ebx
  call  _ZNSo3putEc
  movq  %rax, %rcx
  call  _ZNSo5flushEv
  testl  %ebx, %ebx
  je  .L96
.L100:
  xorl  %edx, %edx
  movq  %r12, %rcx
  tzcntl  %ebx, %edx
  addl  %ebp, %edx
  call  _ZNSolsEi
  movq  %rax, %rdi
  movq  (%rax), %rax
  movq  -24(%rax), %rax
  movq  240(%rdi,%rax), %rsi
  testq  %rsi, %rsi
  je  .L108
  cmpb  $0, 56(%rsi)
  jne  .L109
  movq  %rsi, %rcx
  call  _ZNKSt5ctypeIcE13_M_widen_initEv
  movq  (%rsi), %rax
  movl  $10, %edx
  movq  48(%rax), %rax
  cmpq  %r14, %rax
  je  .L99
  movq  %rsi, %rcx
  call  *%rax
  movsbl  %al, %edx
  jmp  .L99
  .p2align 4,,10


In Java, almost identical code is generated.

public void forEach(long[] bitmap, IntConsumer consumer) {
    for (int i = 0; i < bitmap.length; ++i) {
        long word = bitmap[i];
        while (word != 0) {
            consumer.accept(Long.SIZE * i + Long.numberOfTrailingZeros(word));
            word ^= Long.lowestOneBit(word);
        }
    }
}


The key difference is that xor and blsi haven’t been fused into blsr, so the C++ code is probably slightly faster. A lambda function accumulating the contents of an array is inlined into this loop (the add comes from an inlined lambda, but notice how little time is spent adding compared to computing the bit to switch off in this sample produced by perfasm).

   .83%    0x000002d79d366a19: tzcnt   r9,rcx
  8.53%    0x000002d79d366a1e: add     r9d,ebx
  0.42%    0x000002d79d366a21: cmp     r9d,r8d
  0.00%    0x000002d79d366a24: jnb     2d79d366a4dh
  0.62%    0x000002d79d366a26: add     r10d,dword ptr [rdi+r9*4+10h]
 16.22%    0x000002d79d366a2b: vmovq   r11,xmm4
  6.68%    0x000002d79d366a30: mov     dword ptr [r11+10h],r10d
 27.92%    0x000002d79d366a34: blsi    r10,rcx
  0.55%    0x000002d79d366a39: xor     rcx,r10         
  0.10%    0x000002d79d366a3c: mov     r11,qword ptr [r15+70h]  


It’s this Java code, and its impact on which optimizations can be applied to the IntConsumer that this post focuses on. There are different principles, particularly related to inlining and vectorization opportunities in C++, but this blog is about Java. Depending on what your callback does, you get different benchmark results and you should make different choices about how to do the iteration: you just can’t assess this in isolation.

Special Casing -1

Imagine you have an int[] containing data, and you are iterating over a mask or materialised predicate over that data. For each set bit, you want to add the corresponding entry in the array to a sum. In Java, that looks like this (you’ve already seen the generated assembly above):

@Benchmark
public int reduce() {
    int[] result = new int[1];
    forEach(bitmap, i -> result[0] += data[i]);
    return result[0];
}


How fast can this get? It obviously depends on how full the bitset is. The worst case would be that it’s completely full, and it couldn’t get much better than if only one bit per word were set. The difference is noticeable, but scales by a factor less than the number of bits:

Benchmark Mode Threads Samples Score Score Error (99.9%) Unit Param: scenario
reduce thrpt 1 10 7.435909 0.017491 ops/ms FULL
reduce thrpt 1 10 260.305307 6.081961 ops/ms ONE_BIT_PER_WORD


But the important code here, the callback itself, is stuck at entry level compilation. There is no unrolling, no vectorisation, the adds can’t be pipelined because there is a data dependency on blsi and xor. We can do much better in some cases, and not much worse in others, just by treating -1 as a special case, profiting from optimisations that can now be applied inside the callback. Passing a different callback which consumes whole words costs a branch, but it’s often worth it. Here’s the iterator now:

interface WordConsumer {
    void acceptWord(int wordIndex, long word);
}

public void forEach(long[] bitmap, IntConsumer intConsumer, WordConsumer wordConsumer) {
    for (int i = 0; i < bitmap.length; ++i) {
        long word = bitmap[i];
        if (word == -1 L) {
            wordConsumer.acceptWord(i, word);
        } else {
            while (word != 0) {
                intConsumer.accept(Long.SIZE * i + Long.numberOfTrailingZeros(word));
                word ^= Long.lowestOneBit(word);
            }
        }
    }
}

@Benchmark
public int reduceWithWordConsumer() {
    int[] result = new int[1];
    forEach(bitmap, i -> result[0] += data[i], (index, word) -> {
        if (word != -1 L) {
            throw new IllegalStateException();
        }
        int sum = 0;
        for (int i = index * Long.SIZE; i < (index + 1) * Long.SIZE; ++i) {
            sum += data[i];
        }
        result[0] += sum;
    });
    return result[0];
}


This really pays off when the bitset is full, but having that extra branch does seem to cost something even though it is never taken, whereas the full case improves 6x.

Benchmark Mode Threads Samples Score Score Error (99.9%) Unit Param: scenario
reduce thrpt 1 10 7.401202 0.118648 ops/ms FULL
reduce thrpt 1 10 261.682016 4.155856 ops/ms ONE_BIT_PER_WORD
reduceWithWordConsumer thrpt 1 10 43.972759 0.993264 ops/ms FULL
reduceWithWordConsumer thrpt 1 10 222.824868 4.877147 ops/ms ONE_BIT_PER_WORD


We still don’t actually know the cost of the branch when it’s taken every now and then. To estimate it, we need a new scenario (or new scenarios) which mix full and sparse words. As you might expect, having the WordConsumer is great when one word in every few is full: the fast path is so much faster, it practically skips the word.

Benchmark Mode Threads Samples Score Score Error (99.9%) Unit Param: scenario
reduce thrpt 1 10 157.358633 4.538679 ops/ms SPARSE_16_FULL_WORDS
reduceWithWordConsumer thrpt 1 10 257.041035 7.446404 ops/ms SPARSE_16_FULL_WORDS


So in this scenario, the branch has paid for itself. How? The data dependency has been removed with a countable loop. Here’s the perfasm output. Notice two things: long runs of add instructions, and the vastly reduced percentage against blsi. The time is now spent adding numbers up, not switching off least significant bits. This feels like progress.

....[Hottest Region 1]..............................................................................
c2, com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub, version 170 (804 bytes) 

                                                         ;   {optimized virtual_call}
           0x000001dd5b35acd4: mov     r9,qword ptr [rsp+0a0h]
           0x000001dd5b35acdc: movzx   r11d,byte ptr [r9+94h]  ;*getfield isDone {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@30 (line 144)
                                                         ; implicit exception: dispatches to 0x000001dd5b35b486
           0x000001dd5b35ace4: test    r11d,r11d
           0x000001dd5b35ace7: jne     1dd5b35b19dh      ;*ifeq {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@33 (line 144)
           0x000001dd5b35aced: mov     ebx,1h
           0x000001dd5b35acf2: jmp     1dd5b35ad31h
  0.00%    0x000001dd5b35acf4: vmovq   rdi,xmm0          ;*invokevirtual reduceWithWordConsumer {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35acf9: mov     r8d,dword ptr [rdi+10h]  ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@28 (line 85)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001dd5b35acfd: mov     rdx,qword ptr [rsp+30h]
  0.03%    0x000001dd5b35ad02: nop
  0.00%    0x000001dd5b35ad03: call    1dd5b2c7000h      ; ImmutableOopMap{[160]=Oop [168]=Oop [176]=Oop [40]=NarrowOop [48]=Oop }
                                                         ;*invokevirtual consume {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@20 (line 142)
                                                         ;   {optimized virtual_call}
  0.04%    0x000001dd5b35ad08: mov     r9,qword ptr [rsp+0a0h]
           0x000001dd5b35ad10: movzx   r11d,byte ptr [r9+94h]  ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.02%    0x000001dd5b35ad18: mov     r10,qword ptr [r15+70h]
  0.00%    0x000001dd5b35ad1c: mov     rbx,qword ptr [rsp+40h]
  0.03%    0x000001dd5b35ad21: add     rbx,1h            ; ImmutableOopMap{r9=Oop [160]=Oop [168]=Oop [176]=Oop [40]=NarrowOop [48]=Oop }
                                                         ;*ifeq {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@33 (line 144)
  0.00%    0x000001dd5b35ad25: test    dword ptr [r10],eax  ;   {poll}
  0.00%    0x000001dd5b35ad28: test    r11d,r11d
           0x000001dd5b35ad2b: jne     1dd5b35b1a2h
  0.00%    0x000001dd5b35ad31: mov     rdi,qword ptr [r15+80h]
  0.01%    0x000001dd5b35ad38: mov     r10,rdi
  0.00%    0x000001dd5b35ad3b: add     r10,18h
  0.01%    0x000001dd5b35ad3f: cmp     r10,qword ptr [r15+90h]
           0x000001dd5b35ad46: jnb     1dd5b35b119h      ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ad4c: mov     qword ptr [r15+80h],r10
           0x000001dd5b35ad53: prefetchw byte ptr [r10+0c0h]
  0.00%    0x000001dd5b35ad5b: mov     qword ptr [rdi],1h
  0.01%    0x000001dd5b35ad62: prefetchw byte ptr [r10+100h]
           0x000001dd5b35ad6a: mov     dword ptr [rdi+8h],0f8000168h
                                                         ;   {metadata({type array int})}
  0.00%    0x000001dd5b35ad71: prefetchw byte ptr [r10+140h]
  0.01%    0x000001dd5b35ad79: mov     dword ptr [rdi+0ch],1h
  0.01%    0x000001dd5b35ad80: prefetchw byte ptr [r10+180h]
  0.00%    0x000001dd5b35ad88: mov     qword ptr [rdi+10h],r12  ;*newarray {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@1 (line 74)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ad8c: mov     rcx,qword ptr [rsp+0b0h]
  0.00%    0x000001dd5b35ad94: mov     ebp,dword ptr [rcx+0ch]  ;*getfield bitmap {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@6 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ad97: mov     dword ptr [rsp+70h],ebp
  0.00%    0x000001dd5b35ad9b: mov     rsi,qword ptr [r15+80h]
  0.00%    0x000001dd5b35ada2: mov     r10,rsi
           0x000001dd5b35ada5: add     r10,18h
  0.00%    0x000001dd5b35ada9: cmp     r10,qword ptr [r15+90h]
           0x000001dd5b35adb0: jnb     1dd5b35b14fh      ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35adb6: mov     qword ptr [r15+80h],r10
           0x000001dd5b35adbd: prefetchw byte ptr [r10+0c0h]
  0.00%    0x000001dd5b35adc5: mov     r8,qword ptr [rsp+20h]
  0.01%    0x000001dd5b35adca: mov     r10,qword ptr [r8+0b0h]
  0.01%    0x000001dd5b35add1: mov     qword ptr [rsi],r10
  0.00%    0x000001dd5b35add4: mov     dword ptr [rsi+8h],0f8021906h
                                                         ;   {metadata(&apos;com/openkappa/simd/iterate/BitSetIterator$$Lambda$43&apos;)}
           0x000001dd5b35addb: mov     qword ptr [rsi+10h],r12  ;*new {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@0
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35addf: mov     r11d,dword ptr [rsp+28h]
  0.00%    0x000001dd5b35ade4: mov     dword ptr [rsi+0ch],r11d
                                                         ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ade8: mov     rax,qword ptr [r15+80h]
  0.00%    0x000001dd5b35adef: mov     rbp,rdi
  0.01%    0x000001dd5b35adf2: shr     rbp,3h
  0.00%    0x000001dd5b35adf6: mov     dword ptr [rsi+10h],ebp  ;*putfield arg$2 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@11
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35adf9: mov     r10,rax
  0.00%    0x000001dd5b35adfc: add     r10,18h
  0.00%    0x000001dd5b35ae00: cmp     r10,qword ptr [r15+90h]
           0x000001dd5b35ae07: jnb     1dd5b35b08eh      ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ae0d: mov     qword ptr [r15+80h],r10
  0.00%    0x000001dd5b35ae14: prefetchw byte ptr [r10+0c0h]
  0.00%    0x000001dd5b35ae1c: mov     rdx,qword ptr [rsp+38h]
  0.00%    0x000001dd5b35ae21: mov     r10,qword ptr [rdx+0b0h]
  0.02%    0x000001dd5b35ae28: mov     qword ptr [rax],r10
  0.01%    0x000001dd5b35ae2b: mov     dword ptr [rax+8h],0f8021a86h
                                                         ;   {metadata(&apos;com/openkappa/simd/iterate/BitSetIterator$$Lambda$44&apos;)}
  0.00%    0x000001dd5b35ae32: mov     qword ptr [rax+10h],r12
  0.00%    0x000001dd5b35ae36: mov     dword ptr [rax+0ch],r11d
                                                         ;*new {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::get$Lambda@0
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@18 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ae3a: mov     dword ptr [rax+10h],ebp  ;*invokespecial &lt;init&gt; {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@18 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001dd5b35ae3d: mov     ebp,dword ptr [rsp+70h]
  0.00%    0x000001dd5b35ae41: mov     r13d,dword ptr [r12+rbp*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@6 (line 104)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x000001dd5b35b422
  0.03%    0x000001dd5b35ae46: test    r13d,r13d
           0x000001dd5b35ae49: jbe     1dd5b35b024h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@7 (line 104)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ae4f: mov     r10d,r13d
  0.00%    0x000001dd5b35ae52: dec     r10d
           0x000001dd5b35ae55: cmp     r10d,r13d
           0x000001dd5b35ae58: jnb     1dd5b35b24ah
  0.01%    0x000001dd5b35ae5e: lea     r14,[r12+rbp*8]   ;*getfield bitmap {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@6 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001dd5b35ae62: xor     r10d,r10d
  0.00%    0x000001dd5b35ae65: xor     ebp,ebp
           0x000001dd5b35ae67: mov     qword ptr [rsp+0b0h],rcx
  0.00%    0x000001dd5b35ae6f: mov     qword ptr [rsp+0a0h],r9
           0x000001dd5b35ae77: mov     qword ptr [rsp+20h],r8
  0.01%    0x000001dd5b35ae7c: mov     dword ptr [rsp+28h],r11d
  0.00%    0x000001dd5b35ae81: mov     qword ptr [rsp+38h],rdx
  0.00%    0x000001dd5b35ae86: mov     qword ptr [rsp+40h],rbx
  0.00%    0x000001dd5b35ae8b: vmovq   xmm0,rdi
  0.00%    0x000001dd5b35ae90: jmp     1dd5b35afafh
  0.03%    0x000001dd5b35ae95: mov     r8d,r10d
  0.03%    0x000001dd5b35ae98: add     r8d,40h           ;*imul {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@32 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.04%    0x000001dd5b35ae9c: cmp     r10d,r8d
           0x000001dd5b35ae9f: jnl     1dd5b35b01dh      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@33 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.03%    0x000001dd5b35aea5: mov     r11d,dword ptr [r12+rcx*8+0ch]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@44 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x000001dd5b35b1d3
  0.04%    0x000001dd5b35aeaa: cmp     r10d,r11d
           0x000001dd5b35aead: jnb     1dd5b35b1d3h
  0.04%    0x000001dd5b35aeb3: movsxd  r11,r11d
  0.04%    0x000001dd5b35aeb6: movsxd  r9,r8d
  0.02%    0x000001dd5b35aeb9: dec     r9
  0.05%    0x000001dd5b35aebc: cmp     r9,r11
  0.00%    0x000001dd5b35aebf: jnb     1dd5b35b1d3h
  0.04%    0x000001dd5b35aec5: lea     rdi,[r12+rcx*8]
  0.04%    0x000001dd5b35aec9: mov     ecx,r10d
  0.03%    0x000001dd5b35aecc: inc     ecx
  0.04%    0x000001dd5b35aece: mov     r9d,r10d
  0.04%    0x000001dd5b35aed1: xor     ebx,ebx           ;*iload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@36 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.03%    0x000001dd5b35aed3: add     ebx,dword ptr [rdi+r9*4+10h]
                                                         ;*iadd {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@45 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.20%    0x000001dd5b35aed8: inc     r9d               ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@48 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.04%    0x000001dd5b35aedb: cmp     r9d,ecx
           0x000001dd5b35aede: jl      1dd5b35aed3h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@33 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.04%    0x000001dd5b35aee0: add     r10d,31h
  0.03%    0x000001dd5b35aee4: cmp     r8d,r10d
  0.03%    0x000001dd5b35aee7: mov     r11d,80000000h
  0.04%    0x000001dd5b35aeed: cmovl   r10d,r11d
  0.04%    0x000001dd5b35aef1: cmp     r9d,r10d
           0x000001dd5b35aef4: jnl     1dd5b35af68h
  0.04%    0x000001dd5b35aef6: nop     word ptr [rax+rax+0h]  ;*iload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@36 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.07%    0x000001dd5b35af00: movsxd  r11,r9d
  0.05%    0x000001dd5b35af03: add     ebx,dword ptr [rdi+r9*4+10h]
  0.31%    0x000001dd5b35af08: add     ebx,dword ptr [rdi+r11*4+14h]
  0.32%    0x000001dd5b35af0d: add     ebx,dword ptr [rdi+r11*4+18h]
  0.33%    0x000001dd5b35af12: add     ebx,dword ptr [rdi+r11*4+1ch]
  0.37%    0x000001dd5b35af17: add     ebx,dword ptr [rdi+r11*4+20h]
  0.34%    0x000001dd5b35af1c: add     ebx,dword ptr [rdi+r11*4+24h]
  0.39%    0x000001dd5b35af21: add     ebx,dword ptr [rdi+r11*4+28h]
  0.36%    0x000001dd5b35af26: add     ebx,dword ptr [rdi+r11*4+2ch]
  0.34%    0x000001dd5b35af2b: add     ebx,dword ptr [rdi+r11*4+30h]
  0.35%    0x000001dd5b35af30: add     ebx,dword ptr [rdi+r11*4+34h]
  0.38%    0x000001dd5b35af35: add     ebx,dword ptr [rdi+r11*4+38h]
  0.36%    0x000001dd5b35af3a: add     ebx,dword ptr [rdi+r11*4+3ch]
  0.49%    0x000001dd5b35af3f: add     ebx,dword ptr [rdi+r11*4+40h]
  0.39%    0x000001dd5b35af44: add     ebx,dword ptr [rdi+r11*4+44h]
  0.42%    0x000001dd5b35af49: add     ebx,dword ptr [rdi+r11*4+48h]
  0.39%    0x000001dd5b35af4e: add     ebx,dword ptr [rdi+r11*4+4ch]
                                                         ;*iadd {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@45 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.41%    0x000001dd5b35af53: add     r9d,10h           ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@48 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001dd5b35af57: cmp     r9d,r10d
           0x000001dd5b35af5a: jl      1dd5b35af00h      ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001dd5b35af5c: mov     r11,qword ptr [r15+70h]  ; ImmutableOopMap{rdi=Oop rsi=Oop rax=Oop r14=Oop xmm0=Oop [160]=Oop [168]=Oop [176]=Oop [40]=NarrowOop [48]=Oop [112]=NarrowOop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@51 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001dd5b35af60: test    dword ptr [r11],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@51 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  0.15%    0x000001dd5b35af63: cmp     r9d,r10d
           0x000001dd5b35af66: jl      1dd5b35af00h
           0x000001dd5b35af68: cmp     r9d,r8d
           0x000001dd5b35af6b: jnl     1dd5b35af7dh
           0x000001dd5b35af6d: nop                       ;*iload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@36 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.67%    0x000001dd5b35af70: add     ebx,dword ptr [rdi+r9*4+10h]
                                                         ;*iadd {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@45 (line 81)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.59%    0x000001dd5b35af75: inc     r9d               ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@48 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.13%    0x000001dd5b35af78: cmp     r9d,r8d
           0x000001dd5b35af7b: jl      1dd5b35af70h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@33 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001dd5b35af7d: vmovq   r10,xmm0
  0.02%    0x000001dd5b35af82: add     dword ptr [r10+10h],ebx
  2.64%    0x000001dd5b35af86: mov     r8,rax
  2.45%    0x000001dd5b35af89: mov     r9,rsi            ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.70%    0x000001dd5b35af8c: mov     r10,qword ptr [r15+70h]
  2.16%    0x000001dd5b35af90: mov     r11d,ebp
  2.37%    0x000001dd5b35af93: inc     r11d              ; ImmutableOopMap{r8=Oop r9=Oop rsi=Oop rax=Oop r14=Oop xmm0=Oop [160]=Oop [168]=Oop [176]=Oop [40]=NarrowOop [48]=Oop [112]=NarrowOop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@78 (line 104)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.44%    0x000001dd5b35af96: test    dword ptr [r10],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@78 (line 104)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  2.74%    0x000001dd5b35af99: cmp     r11d,r13d
  0.00%    0x000001dd5b35af9c: jnl     1dd5b35acf4h      ;*aload_1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@10 (line 105)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.14%    0x000001dd5b35afa2: shl     ebp,6h
  2.37%    0x000001dd5b35afa5: mov     r10d,ebp
  2.41%    0x000001dd5b35afa8: add     r10d,40h          ;*imul {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$2@22 (line 80)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/778368703::acceptWord@10
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 107)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.72%    0x000001dd5b35afac: mov     ebp,r11d          ;*aload_1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@10 (line 105)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.14%    0x000001dd5b35afaf: mov     rbx,qword ptr [r14+rbp*8+10h]
                                                         ;*laload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@13 (line 105)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.59%    0x000001dd5b35afb4: mov     r11,qword ptr [rsp+0b0h]
  2.30%    0x000001dd5b35afbc: mov     ecx,dword ptr [r11+10h]  ;*getfield data {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$1@5 (line 75)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::accept@9
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@57 (line 110)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.76%    0x000001dd5b35afc0: cmp     rbx,0ffffffffffffffffh
           0x000001dd5b35afc4: je      1dd5b35ae95h      ;*ifne {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@22 (line 106)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.09%    0x000001dd5b35afca: test    rbx,rbx
  0.00%    0x000001dd5b35afcd: je      1dd5b35af86h      ;*ifeq {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@42 (line 109)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.34%    0x000001dd5b35afcf: mov     r9d,dword ptr [r12+rcx*8+0ch]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$1@9 (line 75)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::accept@9
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@57 (line 110)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x000001dd5b35b3f6
  2.50%    0x000001dd5b35afd4: lea     rdi,[r12+rcx*8]
  2.62%    0x000001dd5b35afd8: nop     dword ptr [rax+rax+0h]  ;*aload_2 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@45 (line 110)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.11%    0x000001dd5b35afe0: vmovq   r11,xmm0
  2.35%    0x000001dd5b35afe5: mov     r8d,dword ptr [r11+10h]  ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduceWithWordConsumer$1@3 (line 75)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::accept@9
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@57 (line 110)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.39%    0x000001dd5b35afe9: tzcnt   r11,rbx
  2.65%    0x000001dd5b35afee: add     r11d,r10d         ;*iadd {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@56 (line 110)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.15%    0x000001dd5b35aff1: cmp     r11d,r9d
  0.00%    0x000001dd5b35aff4: jnb     1dd5b35b04dh
  2.29%    0x000001dd5b35aff6: add     r8d,dword ptr [rdi+r11*4+10h]
 11.03%    0x000001dd5b35affb: vmovq   r11,xmm0
  2.45%    0x000001dd5b35b000: mov     dword ptr [r11+10h],r8d  ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/513487367::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/592450429::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@11 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  3.14%    0x000001dd5b35b004: mov     r11,qword ptr [r15+70h]
  2.18%    0x000001dd5b35b008: blsi    r8,rbx
  2.23%    0x000001dd5b35b00d: xor     rbx,r8            ; ImmutableOopMap{rcx=NarrowOop rdi=Oop rsi=Oop rax=Oop r14=Oop xmm0=Oop [160]=Oop [168]=Oop [176]=Oop [40]=NarrowOop [48]=Oop [112]=NarrowOop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@72 (line 111)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.44%    0x000001dd5b35b010: test    dword ptr [r11],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@72 (line 111)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  2.71%    0x000001dd5b35b013: test    rbx,rbx
           0x000001dd5b35b016: jne     1dd5b35afe0h      ;*ifeq {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@42 (line 109)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduceWithWordConsumer@23 (line 75)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduceWithWordConsumer_jmhTest::reduceWithWordConsumer_thrpt_jmhStub@17 (line 142)
  2.23%    0x000001dd5b35b018: jmp     1dd5b35af86h
           0x000001dd5b35b01d: xor     ebx,ebx
           0x000001dd5b35b01f: jmp     1dd5b35af7dh
           0x000001dd5b35b024: mov     qword ptr [rsp+0b0h],rcx
           0x000001dd5b35b02c: mov     qword ptr [rsp+0a0h],r9
           0x000001dd5b35b034: mov     qword ptr [rsp+20h],r8
           0x000001dd5b35b039: mov     dword ptr [rsp+28h],r11d
           0x000001dd5b35b03e: mov     qword ptr [rsp+38h],rdx
....................................................................................................
 98.92%  <total for region 1>


Heroically ploughing through the full words tells a different story: blsi is up at 11%. This indicates more time is spent iterating rather than evaluating the callback.

....[Hottest Region 1]..............................................................................
c2, com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub, version 164 (218 bytes) 

                                                         ; - java.lang.invoke.LambdaForm$MH/1035918105::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@11 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
           0x0000019f106c66e7: mov     qword ptr [r15+3d8h],rdi
                                                         ;*invokespecial &lt;init&gt; {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/1035918105::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@11 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  0.00%    0x0000019f106c66ee: mov     r10d,dword ptr [rsp+60h]
  0.00%    0x0000019f106c66f3: mov     edx,dword ptr [r12+r10*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@4 (line 89)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x0000019f106c6aba
  0.02%    0x0000019f106c66f8: test    edx,edx
           0x0000019f106c66fa: jbe     19f106c6826h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@5 (line 89)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
           0x0000019f106c6700: mov     r10d,edx
  0.00%    0x0000019f106c6703: dec     r10d
           0x0000019f106c6706: cmp     r10d,edx
           0x0000019f106c6709: jnb     19f106c6942h
  0.00%    0x0000019f106c670f: mov     r10d,dword ptr [rsp+60h]
           0x0000019f106c6714: lea     rax,[r12+r10*8]   ;*getfield bitmap {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@6 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  0.00%    0x0000019f106c6718: xor     ecx,ecx
           0x0000019f106c671a: jmp     19f106c674dh
  1.54%    0x0000019f106c671c: mov     r11,r13
  1.57%    0x0000019f106c671f: mov     r13,rbp
  1.69%    0x0000019f106c6722: mov     r8,r14
  1.46%    0x0000019f106c6725: vmovd   r9d,xmm1
  1.48%    0x0000019f106c672a: vmovq   rbx,xmm0
  1.61%    0x0000019f106c672f: vmovq   r14,xmm2
  1.63%    0x0000019f106c6734: vmovq   rbp,xmm3
  1.46%    0x0000019f106c6739: mov     rdi,rbp           ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/1035918105::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@11 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.49%    0x0000019f106c673c: mov     r10,qword ptr [r15+70h]
  1.54%    0x0000019f106c6740: inc     ecx               ; ImmutableOopMap{r11=Oop r9=NarrowOop rdi=Oop rax=Oop rbp=Oop r13=Oop r14=Oop [152]=Oop [48]=Oop [96]=NarrowOop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@52 (line 89)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.73%    0x0000019f106c6742: test    dword ptr [r10],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@52 (line 89)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  1.43%    0x0000019f106c6745: cmp     ecx,edx
  0.00%    0x0000019f106c6747: jnl     19f106c6480h      ;*aload_1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@8 (line 90)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.57%    0x0000019f106c674d: mov     rdi,qword ptr [rax+rcx*8+10h]
                                                         ;*laload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@10 (line 90)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.61%    0x0000019f106c6752: test    rdi,rdi
           0x0000019f106c6755: je      19f106c6739h      ;*ifeq {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@17 (line 91)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.68%    0x0000019f106c6757: vmovq   xmm3,rbp
  1.47%    0x0000019f106c675c: mov     esi,dword ptr [r11+10h]  ;*getfield data {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduce$0@5 (line 67)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::accept@9
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@31 (line 92)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.48%    0x0000019f106c6760: mov     r10d,dword ptr [r12+rsi*8+0ch]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduce$0@9 (line 67)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::accept@9
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@31 (line 92)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x0000019f106c6a3e
  1.58%    0x0000019f106c6765: vmovq   xmm2,r14
  1.68%    0x0000019f106c676a: vmovq   xmm0,rbx
  1.46%    0x0000019f106c676f: vmovd   xmm1,r9d
  1.46%    0x0000019f106c6774: mov     r14,r8
  1.51%    0x0000019f106c6777: mov     rbp,r13
  1.68%    0x0000019f106c677a: mov     r13,r11
  1.41%    0x0000019f106c677d: lea     r8,[r12+rsi*8]
  1.40%    0x0000019f106c6781: mov     ebx,ecx
  1.55%    0x0000019f106c6783: shl     ebx,6h
  1.63%    0x0000019f106c6786: nop     word ptr [rax+rax+0h]  ;*aload_2 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@20 (line 92)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.68%    0x0000019f106c6790: vmovq   r11,xmm2
  1.70%    0x0000019f106c6795: mov     r11d,dword ptr [r11+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$reduce$0@3 (line 67)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::accept@9
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@31 (line 92)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  6.98%    0x0000019f106c6799: tzcnt   r9,rdi
  3.47%    0x0000019f106c679e: add     r9d,ebx           ;*iadd {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 92)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.65%    0x0000019f106c67a1: cmp     r9d,r10d
           0x0000019f106c67a4: jnb     19f106c67cdh
  1.67%    0x0000019f106c67a6: add     r11d,dword ptr [r8+r9*4+10h]
 11.45%    0x0000019f106c67ab: vmovq   r9,xmm2
  3.20%    0x0000019f106c67b0: mov     dword ptr [r9+10h],r11d  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@46 (line 93)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
 11.31%    0x0000019f106c67b4: blsi    r11,rdi
  1.71%    0x0000019f106c67b9: xor     rdi,r11           ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1830914914::get$Lambda@6
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@11
                                                         ; - java.lang.invoke.LambdaForm$MH/1035918105::linkToTargetMethod@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@11 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.72%    0x0000019f106c67bc: mov     r11,qword ptr [r15+70h]  ; ImmutableOopMap{r8=Oop r9=Oop rsi=NarrowOop rax=Oop rbp=Oop r13=Oop xmm1=NarrowOop xmm2=Oop xmm3=Oop [152]=Oop [48]=Oop [96]=NarrowOop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@46 (line 93)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.80%    0x0000019f106c67c0: test    dword ptr [r11],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@46 (line 93)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  6.99%    0x0000019f106c67c3: test    rdi,rdi
           0x0000019f106c67c6: jne     19f106c6790h      ;*ifeq {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@17 (line 91)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::reduce@16 (line 67)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_reduce_jmhTest::reduce_thrpt_jmhStub@17 (line 142)
  1.39%    0x0000019f106c67c8: jmp     19f106c671ch
           0x0000019f106c67cd: mov     edx,0ffffffe4h
           0x0000019f106c67d2: mov     r10,qword ptr [rsp+98h]
           0x0000019f106c67da: mov     qword ptr [rsp+90h],r10
           0x0000019f106c67e2: mov     r10,qword ptr [rsp+30h]
           0x0000019f106c67e7: mov     qword ptr [rsp+0a0h],r13
           0x0000019f106c67ef: vmovsd  qword ptr [rsp+20h],xmm0
           0x0000019f106c67f5: mov     qword ptr [rsp+28h],r10
....................................................................................................
 98.59%  <total for region 1>


This shows the cost of a data dependency in a loop. The operation we want to perform is associative, so we could even vectorise this. In C++ that might happen automatically, or could be ensured with intrinsics, but C2 has various heuristics: it won’t try to vectorise a simple reduction, and 64 would probably be on the short side for most cases it would try to vectorise.

Acknowledging Runs

You might be tempted to transfer even more control to the callback, by accumulating runs and then calling the callback once per run. It simplifies the code to exclude incomplete start and end words from the run.


private interface RunConsumer {
    void acceptRun(int start, int end);
  }

  public void forEach(long[] bitmap, IntConsumer intConsumer, RunConsumer runConsumer) {
    int runStart = -1;
    for (int i = 0; i < bitmap.length; ++i) {
      long word = bitmap[i];
      if (word == -1L) {
        if (runStart == -1) {
          runStart = i;
        }
      } else {
        if (runStart != -1) {
          runConsumer.acceptRun(runStart * Long.SIZE, i * Long.SIZE);
          runStart = -1;
        }
        while (word != 0) {
          intConsumer.accept(Long.SIZE * i + Long.numberOfTrailingZeros(word));
          word ^= Long.lowestOneBit(word);
        }
      }
    }
    if (runStart != -1) {
      runConsumer.acceptRun(runStart * Long.SIZE, bitmap.length * Long.SIZE);
    }
  }


For a simple reduction, the extra complexity isn’t justified: You’re better off with the WordIterator.

Benchmark Mode Threads Samples Score Score Error (99.9%) Unit Param: scenario
reduce thrpt 1 10 160.502749 2.960568 ops/ms SPARSE_16_FULL_WORDS
reduce thrpt 1 10 7.294747 0.186678 ops/ms FULL
reduce thrpt 1 10 258.064511 8.902233 ops/ms ONE_BIT_PER_WORD
reduce thrpt 1 10 159.613877 3.424432 ops/ms SPARSE_1_16_WORD_RUN
reduceWithRunConsumer thrpt 1 10 251.683131 6.799639 ops/ms SPARSE_16_FULL_WORDS
reduceWithRunConsumer thrpt 1 10 37.809154 0.723198 ops/ms FULL
reduceWithRunConsumer thrpt 1 10 218.133560 13.756779 ops/ms ONE_BIT_PER_WORD
reduceWithRunConsumer thrpt 1 10 140.896826 8.495777 ops/ms SPARSE_1_16_WORD_RUN
reduceWithWordConsumer thrpt 1 10 257.961783 5.892072 ops/ms SPARSE_16_FULL_WORDS
reduceWithWordConsumer thrpt 1 10 43.909471 0.601319 ops/ms FULL
reduceWithWordConsumer thrpt 1 10 213.731758 20.398077 ops/ms ONE_BIT_PER_WORD
reduceWithWordConsumer thrpt 1 10 258.280428 11.316647 ops/ms SPARSE_1_16_WORD_RUN

It’s simplistic to measure this and conclude that this is a bad approach though. There are several other dimensions to this problem:

  1. Vectorized callbacks
  2. Inlining failures preventing optimisations
  3. The number of runs and their lengths (i.e. your data and how you structure it)

Vectorizable Callbacks

There are real benefits to batching up callbacks if the workload in the callback can be vectorised. The code doesn’t need to get much more complicated to start benefitting from larger iteration batches. Mapping each bit to a scaled and squared value from the data array and storing it into an output array illustrates this.

@Benchmark
public void map(Blackhole bh) {
    forEach(bitmap, i -> output[i] = data[i] * data[i] * factor);
    bh.consume(output);
}

@Benchmark
public void mapWithWordConsumer(Blackhole bh) {
    forEach(bitmap, i -> output[0] = data[i] * factor, (WordConsumer)(index, word) -> {
        if (word != -1 L) {
            throw new IllegalStateException();
        }
        for (int i = index * Long.SIZE; i < (index + 1) * Long.SIZE; ++i) {
            output[i] = data[i] * data[i] * factor;
        }
    });
    bh.consume(output);
}

@Benchmark
public void mapWithRunConsumer(Blackhole bh) {
    forEach(bitmap, i -> output[0] = data[i] * factor, (RunConsumer)(start, end) -> {
        for (int i = start; i < end; ++i) {
            output[i] = data[i] * data[i] * factor;
        }
    });
    bh.consume(output);
}


The RunConsumer does much better in the full case, never much worse than the WordConsumer and always better than the basic strategy – even when there is only one run in the entire bitset, or when there are a few full words in an otherwise sparse bitset.

Benchmark Mode Threads Samples Score Score Error (99.9%) Unit Param: scenario
map thrpt 1 10 127.876662 3.411741 ops/ms SPARSE_16_FULL_WORDS
map thrpt 1 10 10.598974 0.022404 ops/ms FULL
map thrpt 1 10 126.434666 18.608547 ops/ms ONE_BIT_PER_WORD
map thrpt 1 10 115.977840 20.449258 ops/ms SPARSE_1_16_WORD_RUN
mapWithRunConsumer thrpt 1 10 199.186167 8.138446 ops/ms SPARSE_16_FULL_WORDS
mapWithRunConsumer thrpt 1 10 64.230868 2.871434 ops/ms FULL
mapWithRunConsumer thrpt 1 10 219.963063 4.257561 ops/ms ONE_BIT_PER_WORD
mapWithRunConsumer thrpt 1 10 203.403804 6.907366 ops/ms SPARSE_1_16_WORD_RUN
mapWithWordConsumer thrpt 1 10 229.822235 5.276084 ops/ms SPARSE_16_FULL_WORDS
mapWithWordConsumer thrpt 1 10 48.381990 3.845642 ops/ms FULL
mapWithWordConsumer thrpt 1 10 218.907803 5.331011 ops/ms ONE_BIT_PER_WORD
mapWithWordConsumer thrpt 1 10 240.795280 10.204818 ops/ms SPARSE_1_16_WORD_RUN

This is simply because the callback was vectorized, and the style of the RunConsumer API allows this to be exploited. This can be seen with perfasm. Both the WordConsumer and RunConsumer are actually vectorized, but the thing to notice is that there are two hot regions in the WordConsumer benchmark: the iteration and the callback, this boundary is often crossed. On the other hand, the RunConsumer implementation spends most of its time in the callback.

WordConsumer

....[Hottest Region 1]..............................................................................
c2, com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub, version 172 (227 bytes) 

           0x000001c2aa13c788: ud2                       ;*athrow {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@21
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@47 (line 226)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001c2aa13c78a: mov     r8d,ecx
  0.23%    0x000001c2aa13c78d: mov     ecx,r8d           ;*aload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@62 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.55%    0x000001c2aa13c790: vmovdqu ymm1,ymmword ptr [r9+r10*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@69 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.15%    0x000001c2aa13c797: vpmulld ymm1,ymm1,ymm1
  3.72%    0x000001c2aa13c79c: vpmulld ymm1,ymm1,ymm2
 16.02%    0x000001c2aa13c7a1: vmovdqu ymmword ptr [rdx+r10*4+10h],ymm1
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@78 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.69%    0x000001c2aa13c7a8: movsxd  r8,r10d
  1.55%    0x000001c2aa13c7ab: vmovdqu ymm1,ymmword ptr [r9+r8*4+30h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@69 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.46%    0x000001c2aa13c7b2: vpmulld ymm1,ymm1,ymm1
  1.71%    0x000001c2aa13c7b7: vpmulld ymm1,ymm1,ymm2
  3.20%    0x000001c2aa13c7bc: vmovdqu ymmword ptr [rdx+r8*4+30h],ymm1
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@78 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.07%    0x000001c2aa13c7c3: add     r10d,10h          ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@79 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.70%    0x000001c2aa13c7c7: cmp     r10d,r11d
           0x000001c2aa13c7ca: jl      1c2aa13c790h      ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1453625478::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1453625478::get$Lambda@5
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@10
                                                         ; - java.lang.invoke.LambdaForm$MH/1166726978::linkToTargetMethod@5
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@6 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.02%    0x000001c2aa13c7cc: mov     r8,qword ptr [r15+70h]  ; ImmutableOopMap{r9=Oop rdx=Oop rax=Oop r13=NarrowOop xmm0=Oop [144]=Oop [152]=Oop [48]=Oop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@82 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.50%    0x000001c2aa13c7d0: test    dword ptr [r8],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@82 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  0.04%    0x000001c2aa13c7d3: cmp     r10d,r11d
           0x000001c2aa13c7d6: jl      1c2aa13c78ah
  0.05%    0x000001c2aa13c7d8: mov     r11d,dword ptr [rsp+5ch]
  0.02%    0x000001c2aa13c7dd: add     r11d,39h
  1.57%    0x000001c2aa13c7e1: mov     r8d,ecx
  0.02%    0x000001c2aa13c7e4: cmp     r8d,r11d
  0.06%    0x000001c2aa13c7e7: mov     ecx,80000000h
  0.02%    0x000001c2aa13c7ec: cmovl   r11d,ecx
  1.50%    0x000001c2aa13c7f0: cmp     r10d,r11d
           0x000001c2aa13c7f3: jnl     1c2aa13c819h
  0.02%    0x000001c2aa13c7f5: nop                       ;*aload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@62 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.06%    0x000001c2aa13c7f8: vmovdqu ymm1,ymmword ptr [r9+r10*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@69 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.21%    0x000001c2aa13c7ff: vpmulld ymm1,ymm1,ymm1
  2.16%    0x000001c2aa13c804: vpmulld ymm1,ymm1,ymm2
  1.80%    0x000001c2aa13c809: vmovdqu ymmword ptr [rdx+r10*4+10h],ymm1
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@78 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.56%    0x000001c2aa13c810: add     r10d,8h           ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@79 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c814: cmp     r10d,r11d
           0x000001c2aa13c817: jl      1c2aa13c7f8h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@59 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c819: cmp     r10d,r8d
           0x000001c2aa13c81c: jnl     1c2aa13c83ah
  0.01%    0x000001c2aa13c81e: nop                       ;*aload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@62 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.58%    0x000001c2aa13c820: mov     ecx,dword ptr [r9+r10*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@69 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.03%    0x000001c2aa13c825: imul    ecx,ecx
  1.58%    0x000001c2aa13c828: imul    ecx,dword ptr [rsp+58h]
  0.03%    0x000001c2aa13c82d: mov     dword ptr [rdx+r10*4+10h],ecx
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@78 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.56%    0x000001c2aa13c832: inc     r10d              ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@79 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c835: cmp     r10d,r8d
           0x000001c2aa13c838: jl      1c2aa13c820h      ;*putfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1453625478::&lt;init&gt;@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$43/1453625478::get$Lambda@5
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@10
                                                         ; - java.lang.invoke.LambdaForm$MH/1166726978::linkToTargetMethod@5
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@6 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.55%    0x000001c2aa13c83a: mov     r10,qword ptr [r15+70h]
  0.01%    0x000001c2aa13c83e: inc     esi               ; ImmutableOopMap{rax=Oop r13=NarrowOop xmm0=Oop [144]=Oop [152]=Oop [48]=Oop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@78 (line 168)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.02%    0x000001c2aa13c840: test    dword ptr [r10],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@78 (line 168)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ;   {poll}
  0.02%    0x000001c2aa13c843: cmp     esi,dword ptr [rsp+0a0h]
           0x000001c2aa13c84a: jnl     1c2aa13cb2ah      ;*aload_1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@10 (line 169)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.54%    0x000001c2aa13c850: mov     r8,rax
  0.01%    0x000001c2aa13c853: mov     r14,qword ptr [rsp+90h]
  0.01%    0x000001c2aa13c85b: mov     rbx,qword ptr [rsp+50h]
  0.01%    0x000001c2aa13c860: mov     r10d,r13d
  1.54%    0x000001c2aa13c863: vmovq   rax,xmm0
  0.01%    0x000001c2aa13c868: mov     r9d,dword ptr [rsp+0a0h]
  0.02%    0x000001c2aa13c870: jmp     1c2aa13c904h
           0x000001c2aa13c875: mov     r13,qword ptr [rsp+98h]
           0x000001c2aa13c87d: mov     r8,qword ptr [rsp+68h]  ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@7 (line 168)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001c2aa13c882: mov     ebp,dword ptr [r8+18h]  ;*getfield output {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@22 (line 141)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001c2aa13c886: mov     r10,qword ptr [rsp+30h]
           0x000001c2aa13c88b: test    r10,r10
....................................................................................................
 53.26%  <total for region 1>

....[Hottest Region 2]..............................................................................
c2, com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub, version 172 (391 bytes) 

                                                         ; implicit exception: dispatches to 0x000001c2aa13cdd6
           0x000001c2aa13c8c8: test    r11d,r11d
           0x000001c2aa13c8cb: jne     1c2aa13cc5eh      ;*ifeq {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@30 (line 144)
           0x000001c2aa13c8d1: mov     ebx,1h            ;*invokespecial &lt;init&gt; {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::get$Lambda@5
                                                         ; - java.lang.invoke.DirectMethodHandle$Holder::invokeStatic@10
                                                         ; - java.lang.invoke.LambdaForm$MH/1166726978::linkToTargetMethod@5
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@12 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c8d6: mov     r8,qword ptr [rsp+0a0h]
  0.01%    0x000001c2aa13c8de: mov     r10d,dword ptr [r8+10h]  ;*getfield bitmap {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@2 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001c2aa13c8e2: mov     r9d,dword ptr [r12+r10*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@6 (line 168)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x000001c2aa13cdc6
  0.04%    0x000001c2aa13c8e7: test    r9d,r9d
           0x000001c2aa13c8ea: jbe     1c2aa13cb2fh      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@7 (line 168)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001c2aa13c8f0: mov     ecx,r9d
           0x000001c2aa13c8f3: dec     ecx
           0x000001c2aa13c8f5: cmp     ecx,r9d
           0x000001c2aa13c8f8: jnb     1c2aa13cd1ah
           0x000001c2aa13c8fe: lea     rax,[r12+r10*8]   ;*getfield bitmap {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@2 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001c2aa13c902: xor     esi,esi           ;*aload_1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@10 (line 169)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c904: mov     r11,qword ptr [rax+rsi*8+10h]
                                                         ;*laload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@13 (line 169)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.57%    0x000001c2aa13c909: cmp     r11,0ffffffffffffffffh
           0x000001c2aa13c90d: jne     1c2aa13cccah      ;*ifne {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@22 (line 170)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c913: mov     edx,dword ptr [r8+14h]  ;*getfield data {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@3 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c917: mov     edi,dword ptr [r12+rdx*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@35 (line 225)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x000001c2aa13cda6
  0.01%    0x000001c2aa13c91c: mov     dword ptr [rsp+0a0h],r9d
  1.56%    0x000001c2aa13c924: mov     r13d,dword ptr [r8+0ch]  ;*getfield factor {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@11 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c928: mov     r11d,esi
  0.02%    0x000001c2aa13c92b: shl     r11d,6h           ;*imul {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@19 (line 223)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c92f: lea     r9,[r12+rdx*8]    ;*getfield data {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@3 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  1.55%    0x000001c2aa13c933: mov     ecx,r11d
  0.01%    0x000001c2aa13c936: add     ecx,40h           ;*imul {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@27 (line 224)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c939: mov     ebp,dword ptr [r8+18h]  ;*getfield output {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@7 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c93d: test    r11d,r11d
  1.55%    0x000001c2aa13c940: jl      1c2aa13ca62h      ;*iflt {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@1
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@36 (line 225)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c946: cmp     r11d,ecx
           0x000001c2aa13c949: jnle    1c2aa13ca62h      ;*if_icmpgt {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@6
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@36 (line 225)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c94f: cmp     ecx,edi
           0x000001c2aa13c951: jnle    1c2aa13ca62h      ;*if_icmple {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@11
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@36 (line 225)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.00%    0x000001c2aa13c957: mov     dword ptr [rsp+60h],ecx
  1.51%    0x000001c2aa13c95b: mov     dword ptr [rsp+5ch],r11d
  0.02%    0x000001c2aa13c960: mov     dword ptr [rsp+58h],r13d
  0.01%    0x000001c2aa13c965: mov     ecx,edi
  0.01%    0x000001c2aa13c967: vmovd   xmm1,edx
  1.48%    0x000001c2aa13c96b: vmovq   xmm0,rax
  0.02%    0x000001c2aa13c970: mov     r13d,r10d
  0.02%    0x000001c2aa13c973: mov     qword ptr [rsp+50h],rbx
  0.01%    0x000001c2aa13c978: mov     qword ptr [rsp+90h],r14
  1.52%    0x000001c2aa13c980: mov     rax,r8
  0.01%    0x000001c2aa13c983: mov     edi,dword ptr [r12+rbp*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@46 (line 226)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
                                                         ; implicit exception: dispatches to 0x000001c2aa13cdb6
  0.01%    0x000001c2aa13c988: lea     rdx,[r12+rbp*8]   ;*getfield output {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@7 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.02%    0x000001c2aa13c98c: mov     r10d,dword ptr [rsp+60h]
  1.50%    0x000001c2aa13c991: cmp     r10d,edi
           0x000001c2aa13c994: jnle    1c2aa13cac2h      ;*if_icmple {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@11
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@47 (line 226)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13c99a: cmp     r11d,r10d
           0x000001c2aa13c99d: jnl     1c2aa13c83ah      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@59 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.02%    0x000001c2aa13c9a3: cmp     r11d,ecx
           0x000001c2aa13c9a6: jnb     1c2aa13cc9ah
  0.01%    0x000001c2aa13c9ac: movsxd  r10,dword ptr [rsp+60h]
  1.58%    0x000001c2aa13c9b1: movsxd  r11,ecx
  0.01%    0x000001c2aa13c9b4: dec     r10
  0.02%    0x000001c2aa13c9b7: cmp     r10,r11
           0x000001c2aa13c9ba: jnb     1c2aa13cc9ah
  0.01%    0x000001c2aa13c9c0: mov     r11d,dword ptr [rsp+5ch]
  1.50%    0x000001c2aa13c9c5: cmp     r11d,edi
           0x000001c2aa13c9c8: jnb     1c2aa13cc9ah
  0.02%    0x000001c2aa13c9ce: movsxd  r11,edi
  0.02%    0x000001c2aa13c9d1: cmp     r10,r11
           0x000001c2aa13c9d4: jnb     1c2aa13cc9ah
  0.02%    0x000001c2aa13c9da: mov     r11d,edx
  1.62%    0x000001c2aa13c9dd: shr     r11d,2h
  0.02%    0x000001c2aa13c9e1: and     r11d,7h
  0.01%    0x000001c2aa13c9e5: add     r11d,dword ptr [rsp+5ch]
  0.02%    0x000001c2aa13c9ea: mov     r8d,3h
  1.55%    0x000001c2aa13c9f0: sub     r8d,r11d
  0.01%    0x000001c2aa13c9f3: and     r8d,7h
  0.01%    0x000001c2aa13c9f7: add     r8d,dword ptr [rsp+5ch]
  0.01%    0x000001c2aa13c9fc: inc     r8d
  1.58%    0x000001c2aa13c9ff: cmp     r8d,dword ptr [rsp+60h]
  0.02%    0x000001c2aa13ca04: mov     ecx,dword ptr [rsp+60h]
  0.02%    0x000001c2aa13ca08: cmovnle r8d,ecx
  0.01%    0x000001c2aa13ca0c: mov     r10d,dword ptr [rsp+5ch]
  1.54%    0x000001c2aa13ca11: mov     ebx,ecx           ;*aload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@62 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.11%    0x000001c2aa13ca13: mov     r11d,dword ptr [r9+r10*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@69 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  4.67%    0x000001c2aa13ca18: imul    r11d,r11d
  0.14%    0x000001c2aa13ca1c: imul    r11d,dword ptr [rsp+58h]
  4.67%    0x000001c2aa13ca22: mov     dword ptr [rdx+r10*4+10h],r11d
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@78 (line 228)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.16%    0x000001c2aa13ca27: inc     r10d              ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@79 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  4.63%    0x000001c2aa13ca2a: cmp     r10d,r8d
           0x000001c2aa13ca2d: jl      1c2aa13ca13h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@59 (line 227)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
  0.01%    0x000001c2aa13ca2f: mov     r11d,dword ptr [rsp+5ch]
  0.01%    0x000001c2aa13ca34: add     r11d,31h
  0.02%    0x000001c2aa13ca38: mov     r8d,ebx
  1.48%    0x000001c2aa13ca3b: cmp     r8d,r11d
  0.01%    0x000001c2aa13ca3e: mov     ebx,80000000h
  0.02%    0x000001c2aa13ca43: cmovl   r11d,ebx
  0.04%    0x000001c2aa13ca47: cmp     r10d,r11d
           0x000001c2aa13ca4a: jnl     1c2aa13c819h
  2.48%    0x000001c2aa13ca50: vpshufd xmm2,xmmword ptr [rsp+58h],0h
  2.82%    0x000001c2aa13ca57: vinserti128 ymm2,ymm2,xmm2,1h
  2.88%    0x000001c2aa13ca5d: jmp     1c2aa13c78dh      ;*aload_3 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@14
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareForWord@36 (line 225)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithWordConsumer$7@14 (line 140)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1872198645::acceptWord@6
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::forEach@30 (line 171)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::mapWithWordConsumer@17 (line 138)
                                                         ; - com.openkappa.simd.iterate.generated.BitSetIterator_mapWithWordConsumer_jmhTest::mapWithWordConsumer_thrpt_jmhStub@17 (line 142)
           0x000001c2aa13ca62: mov     qword ptr [rsp+90h],r14
           0x000001c2aa13ca6a: mov     qword ptr [rsp+28h],r8
....................................................................................................
 46.39%  <total for region 2>


RunConsumer

....[Hottest Region 1]..............................................................................
c2, com.openkappa.simd.iterate.BitSetIterator$$Lambda$44.1209658195::acceptRun, version 166 (816 bytes) 

           # parm1:    r9        = int
           #           [sp+0x50]  (sp of caller)
           0x0000016658954740: mov     r10d,dword ptr [rdx+8h]
           0x0000016658954744: shl     r10,3h
           0x0000016658954748: cmp     rax,r10
           0x000001665895474b: jne     166588c6d80h      ;   {runtime_call ic_miss_stub}
           0x0000016658954751: nop
           0x0000016658954754: nop     dword ptr [rax+rax+0h]
           0x000001665895475c: nop
         [Verified Entry Point]
  0.00%    0x0000016658954760: mov     dword ptr [rsp+0ffffffffffff9000h],eax
  0.00%    0x0000016658954767: push    rbp
           0x0000016658954768: sub     rsp,40h           ;*synchronization entry
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@-1
           0x000001665895476c: mov     ecx,dword ptr [rdx+0ch]  ;*getfield arg$1 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@1
  0.00%    0x000001665895476f: mov     ebx,dword ptr [r12+rcx*8+14h]
                                                         ;*getfield data {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@3 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
                                                         ; implicit exception: dispatches to 0x0000016658954b76
           0x0000016658954774: mov     eax,dword ptr [r12+rbx*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@3 (line 211)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
                                                         ; implicit exception: dispatches to 0x0000016658954b8e
  0.06%    0x0000016658954779: mov     r11d,dword ptr [r12+rcx*8+0ch]
                                                         ;*getfield factor {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@11 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x000001665895477e: mov     edi,dword ptr [r12+rcx*8+18h]
                                                         ;*getfield output {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@7 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x0000016658954783: test    r8d,r8d
           0x0000016658954786: jl      16658954ab6h      ;*iflt {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@1
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@4 (line 211)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x000001665895478c: cmp     r8d,r9d
           0x000001665895478f: jnle    16658954ae6h      ;*if_icmpgt {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@6
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@4 (line 211)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954795: cmp     r9d,eax
           0x0000016658954798: jnle    16658954b1ah      ;*if_icmple {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@11
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@4 (line 211)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x000001665895479e: mov     ebp,dword ptr [r12+rdi*8+0ch]
                                                         ;*arraylength {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@11 (line 212)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
                                                         ; implicit exception: dispatches to 0x0000016658954b9e
  0.05%    0x00000166589547a3: cmp     r9d,ebp
           0x00000166589547a6: jnle    16658954b4ah      ;*if_icmple {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - jdk.internal.util.Preconditions::checkFromToIndex@11
                                                         ; - java.util.Objects::checkFromToIndex@4
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@12 (line 212)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x00000166589547ac: cmp     r8d,r9d
           0x00000166589547af: jnl     16658954a81h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@22 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x00000166589547b5: cmp     r8d,eax
           0x00000166589547b8: jnb     16658954a91h
  0.00%    0x00000166589547be: movsxd  r10,r9d
           0x00000166589547c1: movsxd  rcx,eax
           0x00000166589547c4: dec     r10
           0x00000166589547c7: cmp     r10,rcx
           0x00000166589547ca: jnb     16658954a91h
           0x00000166589547d0: cmp     r8d,ebp
           0x00000166589547d3: jnb     16658954a91h
           0x00000166589547d9: movsxd  rcx,ebp
  0.01%    0x00000166589547dc: cmp     r10,rcx
           0x00000166589547df: jnb     16658954a91h
  0.00%    0x00000166589547e5: shl     rdi,3h            ;*getfield output {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@7 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x00000166589547e9: lea     rdx,[r12+rbx*8]   ;*getfield data {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@3 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x00000166589547ed: mov     r10d,edi
  0.00%    0x00000166589547f0: shr     r10d,2h
  0.00%    0x00000166589547f4: and     r10d,7h
           0x00000166589547f8: add     r10d,r8d
           0x00000166589547fb: mov     ecx,3h
  0.00%    0x0000016658954800: sub     ecx,r10d
  0.00%    0x0000016658954803: and     ecx,7h
           0x0000016658954806: add     ecx,r8d
           0x0000016658954809: inc     ecx
  0.00%    0x000001665895480b: cmp     ecx,r9d
  0.00%    0x000001665895480e: cmovnle ecx,r9d           ;*aload_3 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@25 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954812: mov     r10d,dword ptr [rdx+r8*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954817: imul    r10d,r10d
  0.01%    0x000001665895481b: imul    r10d,r11d
  0.00%    0x000001665895481f: mov     dword ptr [rdi+r8*4+10h],r10d
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954824: inc     r8d               ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@41 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954827: cmp     r8d,ecx
           0x000001665895482a: jl      16658954812h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@22 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x000001665895482c: mov     r10d,r9d
           0x000001665895482f: add     r10d,0ffffff81h
  0.00%    0x0000016658954833: mov     ebx,80000000h
  0.00%    0x0000016658954838: cmp     r9d,r10d
           0x000001665895483b: cmovl   r10d,ebx
           0x000001665895483f: cmp     r8d,r10d
           0x0000016658954842: jnl     16658954a61h
  0.00%    0x0000016658954848: vmovd   xmm1,r11d
           0x000001665895484d: vpshufd xmm1,xmm1,0h
           0x0000016658954852: vinserti128 ymm1,ymm1,xmm1,1h  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@44 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954858: nop     dword ptr [rax+rax+0h]  ;*aload_3 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@25 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.92%    0x0000016658954860: vmovdqu ymm0,ymmword ptr [rdx+r8*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.31%    0x0000016658954867: vpmulld ymm0,ymm0,ymm0
  1.74%    0x000001665895486c: vpmulld ymm0,ymm0,ymm1
  4.55%    0x0000016658954871: vmovdqu ymmword ptr [rdi+r8*4+10h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.69%    0x0000016658954878: movsxd  rcx,r8d
  0.01%    0x000001665895487b: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+30h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.41%    0x0000016658954881: vpmulld ymm0,ymm0,ymm0
  0.78%    0x0000016658954886: vpmulld ymm0,ymm0,ymm1
  0.83%    0x000001665895488b: vmovdqu ymmword ptr [rdi+rcx*4+30h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.25%    0x0000016658954891: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+50h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.29%    0x0000016658954897: vpmulld ymm0,ymm0,ymm0
  1.51%    0x000001665895489c: vpmulld ymm0,ymm0,ymm1
  3.65%    0x00000166589548a1: vmovdqu ymmword ptr [rdi+rcx*4+50h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.54%    0x00000166589548a7: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+70h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.31%    0x00000166589548ad: vpmulld ymm0,ymm0,ymm0
  0.47%    0x00000166589548b2: vpmulld ymm0,ymm0,ymm1
  1.11%    0x00000166589548b7: vmovdqu ymmword ptr [rdi+rcx*4+70h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.28%    0x00000166589548bd: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+90h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.17%    0x00000166589548c6: vpmulld ymm0,ymm0,ymm0
  1.89%    0x00000166589548cb: vpmulld ymm0,ymm0,ymm1
  3.56%    0x00000166589548d0: vmovdqu ymmword ptr [rdi+rcx*4+90h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.73%    0x00000166589548d9: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+0b0h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.21%    0x00000166589548e2: vpmulld ymm0,ymm0,ymm0
  0.34%    0x00000166589548e7: vpmulld ymm0,ymm0,ymm1
  1.29%    0x00000166589548ec: vmovdqu ymmword ptr [rdi+rcx*4+0b0h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.33%    0x00000166589548f5: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+0d0h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.97%    0x00000166589548fe: vpmulld ymm0,ymm0,ymm0
  1.90%    0x0000016658954903: vpmulld ymm0,ymm0,ymm1
  3.59%    0x0000016658954908: vmovdqu ymmword ptr [rdi+rcx*4+0d0h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.82%    0x0000016658954911: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+0f0h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.18%    0x000001665895491a: vpmulld ymm0,ymm0,ymm0
  0.29%    0x000001665895491f: vpmulld ymm0,ymm0,ymm1
  1.25%    0x0000016658954924: vmovdqu ymmword ptr [rdi+rcx*4+0f0h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.33%    0x000001665895492d: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+110h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.10%    0x0000016658954936: vpmulld ymm0,ymm0,ymm0
  2.11%    0x000001665895493b: vpmulld ymm0,ymm0,ymm1
  3.67%    0x0000016658954940: vmovdqu ymmword ptr [rdi+rcx*4+110h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.93%    0x0000016658954949: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+130h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.13%    0x0000016658954952: vpmulld ymm0,ymm0,ymm0
  0.25%    0x0000016658954957: vpmulld ymm0,ymm0,ymm1
  1.35%    0x000001665895495c: vmovdqu ymmword ptr [rdi+rcx*4+130h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.32%    0x0000016658954965: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+150h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.93%    0x000001665895496e: vpmulld ymm0,ymm0,ymm0
  2.16%    0x0000016658954973: vpmulld ymm0,ymm0,ymm1
  3.73%    0x0000016658954978: vmovdqu ymmword ptr [rdi+rcx*4+150h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.95%    0x0000016658954981: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+170h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.14%    0x000001665895498a: vpmulld ymm0,ymm0,ymm0
  0.21%    0x000001665895498f: vpmulld ymm0,ymm0,ymm1
  1.39%    0x0000016658954994: vmovdqu ymmword ptr [rdi+rcx*4+170h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.29%    0x000001665895499d: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+190h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.42%    0x00000166589549a6: vpmulld ymm0,ymm0,ymm0
  2.61%    0x00000166589549ab: vpmulld ymm0,ymm0,ymm1
  4.42%    0x00000166589549b0: vmovdqu ymmword ptr [rdi+rcx*4+190h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.01%    0x00000166589549b9: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+1b0h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.10%    0x00000166589549c2: vpmulld ymm0,ymm0,ymm0
  0.17%    0x00000166589549c7: vpmulld ymm0,ymm0,ymm1
  1.46%    0x00000166589549cc: vmovdqu ymmword ptr [rdi+rcx*4+1b0h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.27%    0x00000166589549d5: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+1d0h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
 13.60%    0x00000166589549de: vpmulld ymm0,ymm0,ymm0
  3.51%    0x00000166589549e3: vpmulld ymm0,ymm0,ymm1
  4.69%    0x00000166589549e8: vmovdqu ymmword ptr [rdi+rcx*4+1d0h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  1.00%    0x00000166589549f1: vmovdqu ymm0,ymmword ptr [rdx+rcx*4+1f0h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.11%    0x00000166589549fa: vpmulld ymm0,ymm0,ymm0
  0.15%    0x00000166589549ff: vpmulld ymm0,ymm0,ymm1
  1.46%    0x0000016658954a04: vmovdqu ymmword ptr [rdi+rcx*4+1f0h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.26%    0x0000016658954a0d: add     r8d,80h           ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@41 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.01%    0x0000016658954a14: cmp     r8d,r10d
           0x0000016658954a17: jl      16658954860h      ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@44 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954a1d: mov     r14,qword ptr [r15+70h]  ; ImmutableOopMap{rdi=Oop rdx=Oop }
                                                         ;*goto {reexecute=1 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@44 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.06%    0x0000016658954a21: test    dword ptr [r14],eax  ;*goto {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@44 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
                                                         ;   {poll}
  0.17%    0x0000016658954a24: cmp     r8d,r10d
           0x0000016658954a27: jl      16658954860h
           0x0000016658954a2d: mov     r10d,r9d
           0x0000016658954a30: add     r10d,0fffffff9h
           0x0000016658954a34: cmp     r9d,r10d
  0.00%    0x0000016658954a37: cmovl   r10d,ebx
           0x0000016658954a3b: cmp     r8d,r10d
           0x0000016658954a3e: jnl     16658954a61h      ;*aload_3 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@25 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x0000016658954a40: vmovdqu ymm0,ymmword ptr [rdx+r8*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.14%    0x0000016658954a47: vpmulld ymm0,ymm0,ymm0
  0.05%    0x0000016658954a4c: vpmulld ymm0,ymm0,ymm1
  0.03%    0x0000016658954a51: vmovdqu ymmword ptr [rdi+r8*4+10h],ymm0
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.04%    0x0000016658954a58: add     r8d,8h            ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@41 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x0000016658954a5c: cmp     r8d,r10d
           0x0000016658954a5f: jl      16658954a40h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@22 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x0000016658954a61: cmp     r8d,r9d
           0x0000016658954a64: jnl     16658954a81h
           0x0000016658954a66: nop                       ;*aload_3 {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@25 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954a68: mov     ecx,dword ptr [rdx+r8*4+10h]
                                                         ;*iaload {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@31 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x0000016658954a6d: imul    ecx,ecx
           0x0000016658954a70: imul    ecx,r11d
           0x0000016658954a74: mov     dword ptr [rdi+r8*4+10h],ecx
                                                         ;*iastore {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@40 (line 214)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954a79: inc     r8d               ;*iinc {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@41 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
           0x0000016658954a7c: cmp     r8d,r9d
  0.00%    0x0000016658954a7f: jl      16658954a68h      ;*if_icmpge {reexecute=0 rethrow=0 return_oop=0}
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::scaleSquareInRun@22 (line 213)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator::lambda$mapWithRunConsumer$9@14 (line 148)
                                                         ; - com.openkappa.simd.iterate.BitSetIterator$$Lambda$44/1209658195::acceptRun@6
  0.00%    0x0000016658954a81: vzeroupper
  0.00%    0x0000016658954a84: add     rsp,40h
           0x0000016658954a88: pop     rbp
  0.00%    0x0000016658954a89: mov     r10,qword ptr [r15+70h]
           0x0000016658954a8d: test    dword ptr [r10],eax  ;   {poll_return}
  0.00%    0x0000016658954a90: ret
           0x0000016658954a91: mov     edx,0ffffff86h
           0x0000016658954a96: mov     ebp,r9d
           0x0000016658954a99: mov     dword ptr [rsp],r11d
           0x0000016658954a9d: mov     dword ptr [rsp+4h],r8d
           0x0000016658954aa2: mov     dword ptr [rsp+8h],ebx
           0x0000016658954aa6: mov     dword ptr [rsp+0ch],edi
           0x0000016658954aaa: nop
           0x0000016658954aac: vzeroupper
           0x0000016658954aaf: call    166588c8a00h      ; ImmutableOopMap{[8]=NarrowOop [12]=NarrowOop }
                                                         ;*aload_3 {reexecute=0 rethrow=0 return_oop=0}
....................................................................................................
 96.10%  <total for region 1>


Inlining

So far, everything has been inlined. Java optimistically assumes you only have one implementation and aggressively inlines at first, deoptimizing to add a branch when it sees a second implementation, deoptimizing again and replacing with a virtual call if it sees a third implementation. This doesn’t matter much usually, but the cost of this not only dwarfs any savings in an iteration strategy; it also prevents various optimizations which can be applied if the code is inlined. Once again, passing a batch of work into the callback completely ameliorates this, because even if the call is virtual, the callback itself might be hot and aggressively optimized. I haven’t benchmarked this because I think the point is self-evident to anyone who would read this far.

Number of Runs

It’s clear to see from the benchmark results that the best choice of iteration strategy is sensitive to what you want to do with the data, but also how it is arranged. It is well documented in database literature that real data sets tend to contain runs. If you are building a bitmap index on some attribute of your data, and you sort your data by that attribute, you will have as many bitmaps as you have attribute values, and each attribute value bitmap will contain a single run. This is almost true for any index on attributes correlated with the attribute chosen for the sort order, and is completely untrue for uncorellated attributes. There are a range of iteration strategies to choose from, and the best iteration strategy for one index may not be the best for another.

My benchmarks are available at GitHub.

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Topics:
java ,iterating over bitsets ,optimization ,benchmarks ,tutorial

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