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https://issues.apache.org/jira/browse/SPARK-9577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-9577:
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Assignee: Apache Spark (was: Reynold Xin)
> Surface concrete iterator types in various sort classes
> -------------------------------------------------------
>
> Key: SPARK-9577
> URL: https://issues.apache.org/jira/browse/SPARK-9577
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Apache Spark
> Fix For: 1.5.0
>
>
> We often return abstract iterator types in various sort-related classes (e.g.
> UnsafeKVExternalSorter).
> It is actually better to return a more concrete type, so the callsite uses
> that type and JIT can inline the iterator calls.
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