GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/10790
[SPARK-12860][SQL] speed up safe projection for primitive types
The idea is simple, use `SpecificMutableRow` instead of `GenericMutableRow`
as result row for safe projection.
A simple benchmark shows about 1.5x speed up for primitive types, code:
https://gist.github.com/cloud-fan/fa77713ccebf0823b2ab#file-safeprojectionbenchmark-scala
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark safe-projection
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10790.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 #10790
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commit 4999c36c6a9710909c1b830119fd5a7789b79257
Author: Wenchen Fan <[email protected]>
Date: 2016-01-17T04:53:19Z
speed up safe projection
commit 6b22c91539cf4f766c6552e303a28faac6fef8eb
Author: Wenchen Fan <[email protected]>
Date: 2016-01-17T06:09:52Z
Merge remote-tracking branch 'origin/master' into safe-projection
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