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https://issues.apache.org/jira/browse/FLINK-17906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen closed FLINK-17906.
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> Simple performance improvements in WatermarkOutputMultiplexer
> -------------------------------------------------------------
>
> Key: FLINK-17906
> URL: https://issues.apache.org/jira/browse/FLINK-17906
> Project: Flink
> Issue Type: Improvement
> Components: API / Core
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Major
> Fix For: 1.11.0
>
>
> The WatermarkOutputMultiplexer has some potential for performance
> improvements:
> - not using volatile variables (all accesses are anyways from the mailbox
> of under the legacy checkpoint lock)
> - Using some boolean logic instead of branches
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