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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2653) Enable object reuse in MergeIterator
Date Wed, 23 Sep 2015 10:21:04 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904311#comment-14904311
] 

ASF GitHub Bot commented on FLINK-2653:
---------------------------------------

Github user greghogan commented on the pull request:

    https://github.com/apache/flink/pull/1115#issuecomment-142556889
  
    I did not rebase.
      https://github.com/greghogan/flink/commits/2653_mergeiterator_object_reuse
    
    Travis CI did build and test for my repo when I pushed the updated branch.
      https://travis-ci.org/greghogan/flink/builds/81660560


> 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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