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https://issues.apache.org/jira/browse/BEAM-8363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16958079#comment-16958079
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Kenneth Knowles commented on BEAM-8363:
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[~reuvenlax] https://github.com/apache/beam/pull/9275 is the only thing that
touched the direct runner in that timeframe. I could imagine messing with how
DoFns are managed could be related.
> Nexmark regression in direct runner in streaming mode
> -----------------------------------------------------
>
> Key: BEAM-8363
> URL: https://issues.apache.org/jira/browse/BEAM-8363
> Project: Beam
> Issue Type: Bug
> Components: runner-direct
> Affects Versions: 2.16.0
> Reporter: Mark Liu
> Priority: Critical
> Fix For: 2.17.0
>
> Attachments: regression_screenshot.png
>
>
> From Nexmark performance dashboard for direct runner:
> https://apache-beam-testing.appspot.com/explore?dashboard=5084698770407424,
> there is a regression for streaming mode happened on August 25.
> The runtime increased about 25% in two days.
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