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https://issues.apache.org/jira/browse/KAFKA-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13964090#comment-13964090
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Ivan Lyutov commented on KAFKA-1351:
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Updated reviewboard https://reviews.apache.org/r/20083/
against branch apache/trunk
> String.format is very expensive in Scala
> ----------------------------------------
>
> Key: KAFKA-1351
> URL: https://issues.apache.org/jira/browse/KAFKA-1351
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.7.2, 0.8.0, 0.8.1
> Reporter: Neha Narkhede
> Labels: newbie
> Attachments: KAFKA-1351.patch, KAFKA-1351_2014-04-07_18:02:18.patch,
> KAFKA-1351_2014-04-09_15:40:11.patch
>
>
> As found in KAFKA-1350, logging is causing significant overhead in the
> performance of a Kafka server. There are several info statements that use
> String.format which is particularly expensive. We should investigate adding
> our own version of String.format that merely uses string concatenation under
> the covers.
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