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https://issues.apache.org/jira/browse/FLINK-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14738879#comment-14738879
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ASF GitHub Bot commented on FLINK-2653:
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GitHub user greghogan opened a pull request:
https://github.com/apache/flink/pull/1115
[FLINK-2653] Enable object reuse in MergeIterator
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/greghogan/flink
2653_mergeiterator_object_reuse
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1115.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 #1115
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commit a9806678ed2dddb56b291282283cf5aea31eba87
Author: Greg Hogan <[email protected]>
Date: 2015-09-10T13:35:39Z
[FLINK-2653] Enable object reuse in MergeIterator
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> Enable object reuse in MergeIterator
> ------------------------------------
>
> Key: FLINK-2653
> URL: https://issues.apache.org/jira/browse/FLINK-2653
> Project: Flink
> Issue Type: Improvement
> Components: Distributed Runtime
> Affects Versions: master
> Reporter: Greg Hogan
>
> MergeIterator currently discards given reusable objects and simply returns a
> new object from the JVM heap. This inefficiency has a noticeable impact on
> garbage collection and runtime overhead (~5% overall performance by my
> measure).
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