Yibo Cai created ARROW-9699:
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Summary: [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
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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