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https://issues.apache.org/jira/browse/FLINK-15122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16992181#comment-16992181
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Jark Wu commented on FLINK-15122:
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In general object copy is very expensive. Providing a benchmark to show how
much perfromance improvement can we get is great.
This topic has already been discussed serveral times in the community, and
there is a suspending FLIP-21 which is related to this issue.
See https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=71012982
> Reusing record object in StreamTaskNetworkInput
> -----------------------------------------------
>
> Key: FLINK-15122
> URL: https://issues.apache.org/jira/browse/FLINK-15122
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Network
> Reporter: Jingsong Lee
> Priority: Major
> Fix For: 1.11.0
>
>
> Now blink's batch is forced to open object reusing, but the data read from
> the network is not reused, which will lead to a large GC of the batch job.
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