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Posted to jira@arrow.apache.org by "Jonathan Keane (Jira)" <ji...@apache.org> on 2021/09/14 19:05:00 UTC

[jira] [Created] (ARROW-13997) [C++] restore exec node based query performance

Jonathan Keane created ARROW-13997:
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             Summary: [C++] restore exec node based query performance
                 Key: ARROW-13997
                 URL: https://issues.apache.org/jira/browse/ARROW-13997
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 6.0.0
            Reporter: Jonathan Keane


The R bindings transitioned to using exec nodes for all queries. Since ARROW-13740 was merged, the performance for our queries has been slower. ARROW-13940 corrected the accidental disabling of multi threading, which recovered some if the performance, but not all of it.

The three benchmarks showing the degradation:
https://conbench.ursa.dev/benchmarks/c6d37c1517af405dbb8ebad83eec010c/
https://conbench.ursa.dev/benchmarks/cec58c9c21234ffbb1bab28b7fe409ef/
https://conbench.ursa.dev/benchmarks/99c04f5ef2fe4caf868904699c2f377c/

For 2 of the three, there was a large increase when ARROW-13740 was merged and plateau, and then a smaller step down when ARROW-13940 was merged, but we still haven't reverted to the pre-change mean.



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