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https://issues.apache.org/jira/browse/TAJO-1407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14364571#comment-14364571
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ASF GitHub Bot commented on TAJO-1407:
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GitHub user navis opened a pull request:
https://github.com/apache/tajo/pull/426
TAJO-1407 Minor performance improvement of MemSortExec
Simple micro benchmark shows 15~30% performance improvement, but this uses
more memory. (Also can make little difference on appearance order of non-key
values, caused by different sort implementation)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/navis/tajo TAJO-1407
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tajo/pull/426.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 #426
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commit 219ff84a6992b2ff44550bbc98e60b006f699863
Author: navis.ryu <[email protected]>
Date: 2015-03-17T04:59:38Z
TAJO-1407 Minor performance improvement of MemSortExec
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> Minor performance improvement of MemSortExec
> --------------------------------------------
>
> Key: TAJO-1407
> URL: https://issues.apache.org/jira/browse/TAJO-1407
> Project: Tajo
> Issue Type: Improvement
> Components: physical operator
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
>
> Currently, tajo uses Collections.sort() with TupleCompartor, which can incur
> some overheads on comparing.
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