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https://issues.apache.org/jira/browse/ARROW-9699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-9699.
-----------------------------------
Fix Version/s: 2.0.0
Resolution: Fixed
Issue resolved by pull request 7963
[https://github.com/apache/arrow/pull/7963]
> [C++][Compute] Improve mode kernel performance for small integer types
> ----------------------------------------------------------------------
>
> Key: ARROW-9699
> URL: https://issues.apache.org/jira/browse/ARROW-9699
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Yibo Cai
> Assignee: Yibo Cai
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Mode kernel usesl hash table to count distinct values. For small integer
> types (bool, int8, uint8), counting directly with a value indexed array can
> be more efficient. This card is to evaluate the approach and upstream patch
> if workable.
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