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https://issues.apache.org/jira/browse/FLINK-16017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17274341#comment-17274341
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Robert Metzger commented on FLINK-16017:
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[~zhuzh] can we close this ticket?
> Improve attachJobGraph Performance
> ----------------------------------
>
> Key: FLINK-16017
> URL: https://issues.apache.org/jira/browse/FLINK-16017
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.10.0
> Reporter: Jiayi Liao
> Priority: Major
>
> Currently {{RegionPartitionReleaseStrategy}} and
> {{AdaptedRestartPipelinedRegionStrategyNG}} both need to compute distinct
> pipelined regions, which affects the performance due to the duplicate
> calculating.
> The best idea that comes to my mind so far is calculating distinct pipelined
> regions in {{DefaultExecutionTopology}} so that we can remove the duplicate
> calculating.
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