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https://issues.apache.org/jira/browse/ARROW-1942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16357447#comment-16357447
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ASF GitHub Bot commented on ARROW-1942:
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wesm commented on issue #1551: ARROW-1942: [C++] Hash table specializations for
small integers
URL: https://github.com/apache/arrow/pull/1551#issuecomment-364220281
@xuepanchen I made the functor changes. Can you add a benchmark for the
8-bit integer case?
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> [C++] Hash table specializations for small integers
> ---------------------------------------------------
>
> Key: ARROW-1942
> URL: https://issues.apache.org/jira/browse/ARROW-1942
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Panchen Xue
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> There is no need to use a dynamically-sized hash table with uint8, int8,
> since a fixed-size lookup table can be used and avoid hashing altogether
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