Github user roshannaik commented on the issue:
https://github.com/apache/storm/pull/2270
I second the observation made by @HeartSaVioR about the hashmap lookups in
critical path. In my profiling & benchmarking, hashmap lookups have shown up as
bottlenecks. With ConcurrentHashmap it only gets worse. I think the perf
impact will be easiest to observe using ConstSpoutNullBoltTopo .... and
compared against LocalorShuffleGropuing ... with loadAwareness and ACKing
disabled in both cases.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
