GitHub user JoshRosen opened a pull request:
https://github.com/apache/spark/pull/9066
[SPARK-11053] Remove use of KVIterator in SortBasedAggregationIterator
SortBasedAggregationIterator uses a KVIterator interface in order to
process input rows as key-value pairs, but this use of KVIterator is
unnecessary, slightly complicates the code, and might hurt performance. This
patch refactors this code to remove the use of this extra layer of iterator
wrapping and simplifies other parts of the code in the process.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/JoshRosen/spark sort-iterator-cleanup
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9066.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 #9066
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commit 91c88ebaf888cf4ca1885af5fa18d2f1c8a4f926
Author: Josh Rosen <joshro...@databricks.com>
Date: 2015-10-11T03:19:37Z
Simplify wrapping of iterator into KVIterator.
commit 2b8bf947b0434146131b3af4a314cc89ace8a874
Author: Josh Rosen <joshro...@databricks.com>
Date: 2015-10-11T04:17:29Z
Remove KVIterator from SortBasedAggregationIterator
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