[jira] [Created] (FLINK-2917) Make non-copying behaviour default for stream operator

[Shang Yuanchun (Jira)]

Gyula Fora created FLINK-2917:
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             Summary: Make non-copying behaviour default for stream operator
                 Key: FLINK-2917
                 URL: https://issues.apache.org/jira/browse/FLINK-2917
             Project: Flink
          Issue Type: Improvement
          Components: Streaming
            Reporter: Gyula Fora
            Priority: Blocker


Currently chained streaming operators copy their output before invoking the process method of the chained output task.

The community has agreed that this might be too big of a price for the immutable semantics and the default behaviour should be changed to not copy.

I suggest to have an api level switch for the Operators to enable copying.



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