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https://issues.apache.org/jira/browse/SPARK-48496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-48496.
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Fix Version/s: 4.0.0
Resolution: Fixed
Fixed in https://github.com/apache/spark/pull/46829
> Use static regex Pattern instances in common/utils JavaUtils
> ------------------------------------------------------------
>
> Key: SPARK-48496
> URL: https://issues.apache.org/jira/browse/SPARK-48496
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 4.0.0
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> Some methods in JavaUtils.java are recompiling regexes on every invocation;
> we should instead store a single cached Pattern.
> This is a minor perf. issue that I spotted in the context of other profiling.
> Not a huge bottleneck in the grand scheme of things, but simple and
> straightforward to fix.
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