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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2019/07/16 16:42:15 UTC
[jira] [Updated] (SPARK-27841) Improve UTF8String
fromString()/toString()/numChars() performance when strings are ASCII
[ https://issues.apache.org/jira/browse/SPARK-27841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-27841:
----------------------------------
Affects Version/s: (was: 2.4.0)
3.0.0
> 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: 3.0.0
> 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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