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https://issues.apache.org/jira/browse/KAFKA-19478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18003565#comment-18003565
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Lucas Brutschy commented on KAFKA-19478:
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https://github.com/apache/kafka/pull/20120
> Optimize sticky assignor
> ------------------------
>
> Key: KAFKA-19478
> URL: https://issues.apache.org/jira/browse/KAFKA-19478
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Lucas Brutschy
> Assignee: Lucas Brutschy
> Priority: Major
>
> The current assignor used in KIP-1071 is verbatim the assignor used on the
> client-side. The assignor performance was not a big concern on the
> client-side, and it seems some additional performance overhead has crept in
> during the adaptation to the broker-side interfaces, so we expected this
> implementation to be too slow for groups of non-trivial size. We need to
> optimize the assignor to be able to efficiently run on the broker.
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