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https://issues.apache.org/jira/browse/SPARK-27841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-27841:
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Assignee: Josh Rosen (was: Apache Spark)
> Improve UTF8String fromString()/toString()/numChars() performance when
> strings are ASCII
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-27841
> URL: https://issues.apache.org/jira/browse/SPARK-27841
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Major
>
> UTF8String's fromString(), toString(), and numChars() methods are performance
> hotspots. For strings which consist entirely of ASCII characters we can make
> performance optimizations which significantly reduce memory allocation and
> copying, greatly improving performance for many common workloads.
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