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https://issues.apache.org/jira/browse/SPARK-21491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen reassigned SPARK-21491:
---------------------------------

    Assignee: Iurii Antykhovych

> 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
>            Assignee: Iurii Antykhovych
>            Priority: Trivial
>             Fix For: 2.3.0
>
>
> 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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