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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/05 01:14:29 UTC

[GitHub] [beam] damccorm opened a new issue, #21675: Optimize precombining table.

damccorm opened a new issue, #21675:
URL: https://github.com/apache/beam/issues/21675

   The current code constructs, hashes, and compares full WindowedValues for the grouping key, which ends up dominating the time spent in the combining table when using trivial combiners (like Sum.integers()). We only need compare the (structural value of the) key and windows, and can emit the windows in the global case.
   
   Imported from Jira [BEAM-14464](https://issues.apache.org/jira/browse/BEAM-14464). Original Jira may contain additional context.
   Reported by: robertwb.


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