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https://issues.apache.org/jira/browse/BEAM-11403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Boyuan Zhang reassigned BEAM-11403:
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Assignee: Boyuan Zhang
> Unbounded SDF wrapper causes performance regression on DirectRunner
> -------------------------------------------------------------------
>
> Key: BEAM-11403
> URL: https://issues.apache.org/jira/browse/BEAM-11403
> Project: Beam
> Issue Type: Bug
> Components: runner-direct, sdk-java-core
> Reporter: Boyuan Zhang
> Assignee: Boyuan Zhang
> Priority: P2
>
> There is a significant performance regression when switching from
> UnboundedSource to Unbounded SDF wrapper. So far there are 2 IOs reported:
> * Pubsub Read:
> https://lists.apache.org/thread.html/re6b0941a8b4951293a0327ce9b25e607cafd6e45b69783f65290edee%40%3Cdev.beam.apache.org%3E
> * Kafka Read: https://the-asf.slack.com/archives/C9H0YNP3P/p1606155042346600
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