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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 latencyUDP 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.javaFrom http://vanillajava.blogspot.com/2011/07/how-fast-are-java-datagrams.html
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