Github user revans2 commented on the issue:
https://github.com/apache/storm/pull/2270
Thanks to everyone for all of the help in looking at this and testing it.
I know there is still some low hanging fruit in improving the performance in
many areas. As @roshannaik pointed out
> Once (hopefully soon) we fix the two bottlenecks (ACKer & interworker),
there is a possibility that we may have to revisit and optimize this.
We can look at optimizing a lot of things once that happens.
For me the real question is do we want another form of grouping, or can
this replace one of the current forms? It feels like it could easily replace
local or shuffle as the performance is almost identical to it. The only thing
it is missing is some load aware work, and once #2261 goes in I would be happy
to help combine the two together. Perhaps we can even get to the point where
this can replace shuffle as well (if we do a good enough job of making it fast).
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