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https://issues.apache.org/jira/browse/KAFKA-1115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13811827#comment-13811827
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Guozhang Wang commented on KAFKA-1115:
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Ah got it. Good point.
> producer performance affected by trace/debug calls
> --------------------------------------------------
>
> Key: KAFKA-1115
> URL: https://issues.apache.org/jira/browse/KAFKA-1115
> Project: Kafka
> Issue Type: Improvement
> Components: producer
> Affects Versions: 0.8
> Reporter: Francois Saint-Jacques
> Assignee: Francois Saint-Jacques
> Attachments: producer-performance-fix.patch
>
>
> After investigating high CPU usage on some producers in production, we found
> out that a lot of time was passed in string construction for logging of DEBUG
> and TRACE level.
> This patch removes most of the logging calls, on our systems it cuts CPU
> usage down to half of what it used to be.
> Note that this is a significant boost in performance for environment where
> there are thousands of msg/s.
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