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https://issues.apache.org/jira/browse/SPARK-14724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davies Liu resolved SPARK-14724.
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Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 12490
[https://github.com/apache/spark/pull/12490]
> Improve performance of sorting by using radix sort when possible
> ----------------------------------------------------------------
>
> Key: SPARK-14724
> URL: https://issues.apache.org/jira/browse/SPARK-14724
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Eric Liang
> Fix For: 2.0.0
>
>
> Spark currently uses TimSort for all in-memory sorts, including sorts done
> for shuffle. One low-hanging fruit is to use radix sort when possible (e.g.
> sorting by integer keys).
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