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https://issues.apache.org/jira/browse/FLINK-1764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14372033#comment-14372033
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Gyula Fora commented on FLINK-1764:
-----------------------------------
I removed the accidental filter double copy in this commit :
https://github.com/apache/flink/commit/0619c0526387f4cc7d81537d17ae42ee6196edbd
> Rework record copying logic in streaming API
> --------------------------------------------
>
> Key: FLINK-1764
> URL: https://issues.apache.org/jira/browse/FLINK-1764
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 0.9
> Reporter: Stephan Ewen
>
> The logic for chained tasks in the streaming API does a lot of copying of
> records. In some cases, a record is copied multiple times before being passed
> to a function.
> This seems unnecessary, in the general case. In any case, multiple copies
> seem incorrect.
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