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Posted to jira@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2021/03/31 12:21:00 UTC

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

     [ https://issues.apache.org/jira/browse/ARROW-12123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Lamb resolved ARROW-12123.
---------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

Issue resolved by pull request 9826
[https://github.com/apache/arrow/pull/9826]

> [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
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> 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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