GitHub user Fokko opened a pull request:
https://github.com/apache/spark/pull/10839
[SPARK-12869] Implemented an improved version of the toIndexedRowMatrix
Hi guys,
I've implemented an improved version of the `toIndexedRowMatrix` function
on the `BlockMatrix`. I needed this for a project, but would like to share it
with the rest of the community. In the case of dense matrices, it can increase
performance up to 19 times:
https://github.com/Fokko/BlockMatrixToIndexedRowMatrix
If there are any questions or suggestions, please let me know. Keep up the
good work! Cheers.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Fokko/spark master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10839.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 #10839
----
commit 4d7c2977095c52e45470c9b7c19dcb24e74eee43
Author: Fokko Driesprong <[email protected]>
Date: 2016-01-19T21:47:13Z
Implemented an improved version of the toIndexedRowMatrix method of the
BlockMatrix
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