GitHub user mridulm opened a pull request:
https://github.com/apache/spark/pull/5862
[SPARK-7323] [Spark Core] Use insertAll instead of insert while merging
combiners in reducer
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mridulm/spark optimize_aggregator
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5862.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 #5862
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commit 61cf43a467ea6b8f23ca70d4d5b1f2657677e49b
Author: Mridul Muralidharan <[email protected]>
Date: 2015-05-02T07:23:03Z
Use insertAll instead of insert - much more expensive to do it per tuple
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