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https://issues.apache.org/jira/browse/SPARK-6794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14486631#comment-14486631
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Apache Spark commented on SPARK-6794:
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User 'vlyubin' has created a pull request for this issue:
https://github.com/apache/spark/pull/5433
> Speed up default BroadcastHashJoin performance by using kryo-based
> SparkSerializer
> ----------------------------------------------------------------------------------
>
> Key: SPARK-6794
> URL: https://issues.apache.org/jira/browse/SPARK-6794
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Volodymyr Lyubinets
>
> This won't matter if kryo is already used, but will make a speedup if it's
> not. I'll submit a PR shortly.
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