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https://issues.apache.org/jira/browse/FLINK-14811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrey Zagrebin reassigned FLINK-14811:
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Assignee: Zhu Zhu
> Replace Java Streams with for-loops in vertex input checking
> ------------------------------------------------------------
>
> Key: FLINK-14811
> URL: https://issues.apache.org/jira/browse/FLINK-14811
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.10.0
> Reporter: Zhu Zhu
> Assignee: Zhu Zhu
> Priority: Major
>
> Vertex input checking is invoked in lazily triggered scheduling by a FINISHED
> vertex state update RPC or a {{scheduleOrUpdateConsumers}} RPC.
> Java Streams is used in it, but it should be avoided since it is performance
> critical code. See ref [1] and [2].
> We should refactor these Java Streams to improve the performance, for both
> legacy scheduler and NG schedulers.
> cc [~sewen] [~gjy]
> [1] [flink code style
> guide|https://flink.apache.org/contributing/code-style-and-quality-java.html]
> [2] [discussion & performance
> test|https://issues.apache.org/jira/browse/FLINK-14735?focusedCommentId=16974209&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16974209]
> which compares the performance.
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