ASF GitHub Bot commented on KAFKA-4289:

Github user asfgit closed the pull request at:


> CPU wasted on reflection calls initializing short-lived loggers
> ---------------------------------------------------------------
>                 Key: KAFKA-4289
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4289
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions:
>            Reporter: radai rosenblatt
> an internal profiling run at linkedin found ~5% of the CPU time consumed by 
> `sun.reflect.Reflection.getCallerClass()`.
> digging into the stack trace shows its from initializing short lived logger 
> objects in `FileMessageSet` and `RequestChannel.Request`

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