[GitHub] [flink] chenkovsky opened a new pull request #10572: [FLINK-15249] Improve PipelinedRegions calculation performance

[GitBox <gi...@apache.org>]

chenkovsky opened a new pull request #10572: [FLINK-15249] Improve PipelinedRegions calculation performance
URL: https://github.com/apache/flink/pull/10572
 
 
   # What is the purpose of the change
   This pull request improves the performance of PipelinedRegions calculation.
   
   # Brief change log
   The cost of union set merging is O(1). But current implement copies all vertices in one set to another set, its cost is O(n).
   
   # Verifying this change
   This change is already covered by existing tests.
   
   # Does this pull request potentially affect one of the following parts:
   Dependencies (does it add or upgrade a dependency): (no)
   The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
   The serializers: (no)
   The runtime per-record code paths (performance sensitive): (no)
   Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
   The S3 file system connector: (no)
   # Documentation
   Does this pull request introduce a new feature? (no)
   If yes, how is the feature documented? (not applicable)

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