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Posted to dev@kafka.apache.org by "Andrew Musselman (JIRA)" <ji...@apache.org> on 2016/10/17 18:13:58 UTC

[jira] [Commented] (KAFKA-1351) String.format is very expensive in Scala

    [ https://issues.apache.org/jira/browse/KAFKA-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582973#comment-15582973 ] 

Andrew Musselman commented on KAFKA-1351:
-----------------------------------------

Still open?

> 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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