GitHub user mengxr opened a pull request:
https://github.com/apache/spark/pull/2937
[SPARK-4084] Reuse sort key in Sorter
Sorter uses generic-typed key for sorting. When data is large, it creates
lots of key objects, which is not efficient. We should reuse the key in Sorter
for memory efficiency. This change is part of the petabyte sort implementation
from @rxin .
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mengxr/spark SPARK-4084
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2937.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 #2937
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commit 464ddcec24d0c8c1554a31427560489b55803fd2
Author: Reynold Xin <r...@apache.org>
Date: 2014-09-25T02:05:04Z
cherry-pick rxin's commit
commit cf94e8adf717cdedf3c4b6e99d513ad5bd6da572
Author: Xiangrui Meng <m...@databricks.com>
Date: 2014-10-24T21:32:49Z
renaming
commit b00db4d0cd0b4080e296b1100f57918548568c18
Author: Xiangrui Meng <m...@databricks.com>
Date: 2014-10-24T22:00:31Z
doc and tests
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