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https://issues.apache.org/jira/browse/SPARK-48791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17867038#comment-17867038
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Dongjoon Hyun commented on SPARK-48791:
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I added a fix version, 3.5.3, for now because it arrives after RC1 tagging.
> Perf regression due to accumulator registration overhead using
> CopyOnWriteArrayList
> -----------------------------------------------------------------------------------
>
> Key: SPARK-48791
> URL: https://issues.apache.org/jira/browse/SPARK-48791
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 4.0.0, 3.5.1, 3.3.4, 3.4.3
> Reporter: wuyi
> Assignee: wuyi
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0, 3.5.3
>
>
> We noticed query perf regression and locate the root cause is the overhead
> introuduced when registering accumulators using CopyOnWriteArrayList.
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