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https://issues.apache.org/jira/browse/ARROW-9873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17185923#comment-17185923
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Antoine Pitrou commented on ARROW-9873:
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If the input is a ChunkedArray (not sure that's possible now), you could have a
chunk with a small range and another chunk with a large range.
> [C++][Compute] Improve mode kernel for intergers within limited value range
> ---------------------------------------------------------------------------
>
> Key: ARROW-9873
> URL: https://issues.apache.org/jira/browse/ARROW-9873
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Yibo Cai
> Assignee: Yibo Cai
> Priority: Major
> Attachments: mode-range-skylake.png
>
>
> It's possible to improve mode kernel performance for integers within limited
> value range by using a value indexed array instead of general hash table.
> Similar trick is used in sorting kernel ARROW-1571.
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