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https://issues.apache.org/jira/browse/SPARK-2553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14064709#comment-14064709
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Sandy Ryza commented on SPARK-2553:
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https://github.com/apache/spark/pull/1461
> CoGroupedRDD unnecessarily allocates a Tuple2 per dep per key
> -------------------------------------------------------------
>
> Key: SPARK-2553
> URL: https://issues.apache.org/jira/browse/SPARK-2553
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Sandy Ryza
>
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