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https://issues.apache.org/jira/browse/SPARK-9692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660458#comment-14660458
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Apache Spark commented on SPARK-9692:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/8000
> Remove SqlNewHadoopRDD's generated Tuple2 and InterruptibleIterator
> -------------------------------------------------------------------
>
> Key: SPARK-9692
> URL: https://issues.apache.org/jira/browse/SPARK-9692
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
>
> A small performance optimization -- we don't need to generate a Tuple2 and
> then immediately discard the key. We also don't need an extra wrapper.
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