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https://issues.apache.org/jira/browse/FLINK-15249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17050956#comment-17050956
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Gary Yao commented on FLINK-15249:
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I just wanted to point out that microbenchmarks can be difficult to get right
and running the code with a single iteration most likely will not yield
accurate results. It is recommended to use JMH or Caliper. Also see
https://stackoverflow.com/questions/504103/how-do-i-write-a-correct-micro-benchmark-in-java
> 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,
> RegionFailoverPerfTest.java, new.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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