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Posted to issues@flink.apache.org by "Stephan Ewen (JIRA)" <ji...@apache.org> on 2015/09/29 14:17:04 UTC

[jira] [Closed] (FLINK-2653) Enable object reuse in MergeIterator

     [ https://issues.apache.org/jira/browse/FLINK-2653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen closed FLINK-2653.
-------------------------------

> 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
>             Fix For: 0.10
>
>
> 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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