GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/11010
[SPARK-12950] [SQL] Improve lookup of BytesToBytesMap in aggregate
This PR improve the lookup of BytesToBytesMap by:
1. Generate code for calculate the hash code of grouping keys.
2. Do not use MemoryLocation, fetch the baseObject and offset for key and
value directly (remove the indirection).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark gen_map
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11010.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 #11010
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commit 64df01e138554aee6c3d79b4a33a5842b7e12e9f
Author: Davies Liu <[email protected]>
Date: 2016-02-02T00:43:52Z
improve BytesToBytesMap
commit 4cefbc5fdc02a9a39f4870767146932b28cf96e4
Author: Davies Liu <[email protected]>
Date: 2016-02-02T00:44:04Z
Merge branch 'master' of github.com:apache/spark into gen_map
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