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https://issues.apache.org/jira/browse/FLINK-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14903728#comment-14903728
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ASF GitHub Bot commented on FLINK-2653:
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Github user greghogan commented on the pull request:
https://github.com/apache/flink/pull/1115#issuecomment-142463454
@StephanEwen, the requested changes are now in a second commit for this
pull request. I'm not seeing any messages through JIRA. The only location I was
unable to access the configuration (and therefore had to hard code `false`) was
with the `DataSinkProcessor` for Tez.
> 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
> Assignee: 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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