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Posted to issues@beam.apache.org by "Kenneth Knowles (Jira)" <ji...@apache.org> on 2022/05/12 17:55:00 UTC

[jira] [Updated] (BEAM-14464) Optimize precombining table.

     [ https://issues.apache.org/jira/browse/BEAM-14464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kenneth Knowles updated BEAM-14464:
-----------------------------------
    Status: Open  (was: Triage Needed)

> Optimize precombining table.
> ----------------------------
>
>                 Key: BEAM-14464
>                 URL: https://issues.apache.org/jira/browse/BEAM-14464
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Robert Bradshaw
>            Priority: P2
>
> 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.



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