GitHub user SereneAnt opened a pull request:
https://github.com/apache/spark/pull/18693
[SPARK-21491][GraphX] Enhance GraphX performance: breakOut instead of .toMap
## What changes were proposed in this pull request?
`Traversable.toMap` changed to 'collections.breakOut', that eliminates
intermediate tuple collection creation, see [Stack Overflow
article](https://stackoverflow.com/questions/1715681/scala-2-8-breakout).
## How was this patch tested?
Unit tests run.
No performance tests performed yet.
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/SereneAnt/spark performance_toMap-breakOut
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18693.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18693
----
commit d7b73b544116314439a536ac944d66a8d7ee1113
Author: iurii.ant <[email protected]>
Date: 2017-07-20T21:03:43Z
[SPARK-21491][GraphX] Enhance GraphX performance: eliminate intermediate
collections creation with breakOut
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