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https://issues.apache.org/jira/browse/SPARK-4112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen updated SPARK-4112:
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Component/s: Shuffle
> Have a reserved copy of Sorter/SortDataFormat
> ---------------------------------------------
>
> Key: SPARK-4112
> URL: https://issues.apache.org/jira/browse/SPARK-4112
> Project: Spark
> Issue Type: Improvement
> Components: Shuffle, Spark Core
> Affects Versions: 1.2.0
> Reporter: Xiangrui Meng
>
> After SPARK-4084, developers can use Sorter with their own SortDataFormat.
> However, if there are multiple subclasses of SortDataFormat instantiated, JIT
> won't inline the methods in SortDataFormat and virtual method table lookup is
> slow. One solution could be making two copies of the code and reserve one for
> shuffle only, and expose the other to developers.
> Before we do that, we should compare the performance with/without JIT and
> check whether it is worth the extra code complexity.
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