hg: jdk/sandbox: added some micro benchmarks (SocketChannelCompare does direct comparison)

[michael.x.mcmahon at oracle.com]

Changeset: 57a2e3ed90ec
Author:    michaelm
Date:      2019-11-05 15:10 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/57a2e3ed90ec

added some micro benchmarks (SocketChannelCompare does direct comparison)

+ test/micro/org/openjdk/bench/java/net/SocketChannelCompare.java
+ test/micro/org/openjdk/bench/java/net/UnixSocketChannelReadWrite.java