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Posted to issues@arrow.apache.org by "Daniël Heres (Jira)" <ji...@apache.org> on 2021/03/28 14:25:00 UTC

[jira] [Created] (ARROW-12123) [Rust][DataFusion] Use smallvec for indices for better join performance

Daniël Heres created ARROW-12123:
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             Summary: [Rust][DataFusion] Use smallvec for indices for better join performance
                 Key: ARROW-12123
                 URL: https://issues.apache.org/jira/browse/ARROW-12123
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Rust - DataFusion
            Reporter: Daniël Heres
            Assignee: Daniël Heres


Change type from

HashMap<u64, Vec<[u64; 1]>

to 

HashMap<u64, SmallVec<[u64; 1]>

for better performance whenever each value is represented (mostly) once




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