[jira] [Created] (FLINK-16001) Avoid using Java Streams in construction of ExecutionGraph

[Jiayi Liao (Jira)]

Jiayi Liao created FLINK-16001:
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             Summary: Avoid using Java Streams in construction of ExecutionGraph
                 Key: FLINK-16001
                 URL: https://issues.apache.org/jira/browse/FLINK-16001
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Coordination
    Affects Versions: 1.10.0
            Reporter: Jiayi Liao


I think we should avoid {{Java Streams}} in construction of {{ExecutionGraph}} 
like function {{toPipelinedRegionsSet}} in {{PipelinedRegionComputeUtil}} 
because the job submission is definitely performance sensitive, especially when 
{{distinctRegions}} has a large cardinality.

Also includes some other places in package 
{{org.apache.flink.runtime.executiongraph}}

cc [~trohrmann] [~zhuzh] 



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