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https://issues.apache.org/jira/browse/SPARK-21491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16099390#comment-16099390
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Iurii Antykhovych commented on SPARK-21491:
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Done,
could you please re-check.
> Performance enhancement: eliminate creation of intermediate collections
> -----------------------------------------------------------------------
>
> Key: SPARK-21491
> URL: https://issues.apache.org/jira/browse/SPARK-21491
> Project: Spark
> Issue Type: Improvement
> Components: GraphX
> Affects Versions: 2.2.0
> Reporter: Iurii Antykhovych
> Priority: Trivial
>
> Simple performance optimization in a few places of GraphX:
> {{Traversable.toMap}} can be replaced with {{collection.breakout}}.
> This would eliminate creation of an intermediate collection of tuples, see
> [Stack Overflow
> article|https://stackoverflow.com/questions/1715681/scala-2-8-breakout]
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