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https://issues.apache.org/jira/browse/STORM-865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582255#comment-14582255
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Robert Joseph Evans commented on STORM-865:
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I was wrong, that line does not appear to be the issue. I need to look into it
more.
> Reflection in send path
> -----------------------
>
> Key: STORM-865
> URL: https://issues.apache.org/jira/browse/STORM-865
> Project: Apache Storm
> Issue Type: Bug
> Reporter: Robert Joseph Evans
>
> I was doing some profiling and found that reflection was happening in the
> send path, and was having a significant impact to performance.
> java.lang.Class.getMethods()
> clojure.lang.Reflector.getMethods()
> clojure.lang.Reflector.invokeInstanceMethod()
> backtype.storm.daemon.worker$mk_transfer_fn$transfer_fn__3760.invoke()
> backtype.storm.daemon.executor$start_batch_transfer__GT_worker_handler_BANG_$fn__3411.invoke()
> I'm not totally sure which line it is coming from, but the only java method
> call that does not have a type hint already appears to be
> https://github.com/apache/storm/blob/master/storm-core/src/clj/backtype/storm/daemon/executor.clj#L279
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