Github user HeartSaVioR commented on the issue:
https://github.com/apache/storm/pull/2261
From second commits I added performance tests on multi threads:
`testBenchmarkLoadAwareShuffleGroupingEvenLoad` and
`testBenchmarkLoadAwareShuffleGroupingUnevenLoad`.
I started exploring this with 2 threads, and may explore it with more
threads if necessary.
> testBenchmarkLoadAwareShuffleGroupingEvenLoad (old)
Max duration among threads is : 185274 ms
Max duration among threads is : 189359 ms
> testBenchmarkLoadAwareShuffleGroupingEvenLoad (new)
Max duration among threads is : 123411 ms
Max duration among threads is : 128937 ms
> testBenchmarkLoadAwareShuffleGroupingUnevenLoad (old)
Max duration among threads is : 184834 ms
Max duration among threads is : 185551 ms
> testBenchmarkLoadAwareShuffleGroupingUnevenLoad (new)
Max duration among threads is : 123978 ms
Max duration among threads is : 124113 ms
The test result clearly shows that both are having performance hit on
multi-threads but new LASG is affected much less than old LASG.
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