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https://issues.apache.org/jira/browse/FLINK-15249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17000686#comment-17000686
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Zhu Zhu commented on FLINK-15249:
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Hi [~nppoly], sorry but I'm still busy with some 1.10 release matters.
May get back to you later when 1.10 issues are calmed down a bit.
It would be great if we can improve the region building performance without
introducing regression to any other cases/topologies.
> Improve PipelinedRegions calculation with Union Set
> ---------------------------------------------------
>
> Key: FLINK-15249
> URL: https://issues.apache.org/jira/browse/FLINK-15249
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Reporter: Chongchen Chen
> Priority: Major
> Labels: pull-request-available
> Attachments: PipelinedRegionComputeUtil.diff
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Union Set's Merge Set cost is O(1). current implementation is O(N). the
> attachment is patch.
> [Disjoint Set Data
> Structure|[https://en.wikipedia.org/wiki/Disjoint-set_data_structure]]
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