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How fast are Java Datagrams?

DZone's Guide to

How fast are Java Datagrams?

· Performance Zone ·
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Overview

Following my article How fast are Java sockets, this article follows the same tests except for Datagrams which use UDP rather than TCP.

The timings

The tests are the same except Datagrams don't support busy waiting in Java 6 which hurts the Threaded Ping latency

UDP Pings per second 224 K/s
UDP Pings latency was 1/50/99%tile 4.1/4.2/4.7 us
Threaded UDP Pings per second 131 K/s
Threaded UDP Pings latency was 1/50/99%tile 9.8/11.0/33.2 us

Comparison


Test  Threaded  Throughput Typical latency
Datagram Ping no 224 K/s  4.2 μs
Socket Ping no 170 K/s  5.8 μs
Datagram Ping yes 131 K/s 11.0 μs
Socket Ping yes 235 K/s 8.5 μs

The Code

DatagramPingTest.java

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