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https://issues.apache.org/jira/browse/SPARK-48791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-48791.
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Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 47197
[https://github.com/apache/spark/pull/47197]
> 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
>
>
> We noticed query perf regression and locate the root cause is the overhead
> introuduced when registering accumulators using CopyOnWriteArrayList.
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