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Posted to jira@arrow.apache.org by "Rok Mihevc (Jira)" <ji...@apache.org> on 2023/01/11 07:20:03 UTC

[jira] [Commented] (ARROW-2211) [C++] Use simpler hash functions for integers

    [ https://issues.apache.org/jira/browse/ARROW-2211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17659239#comment-17659239 ] 

Rok Mihevc commented on ARROW-2211:
-----------------------------------

This issue has been migrated to [issue #18175|https://github.com/apache/arrow/issues/18175] on GitHub. Please see the [migration documentation|https://github.com/apache/arrow/issues/14542] for further details.

> [C++] Use simpler hash functions for integers
> ---------------------------------------------
>
>                 Key: ARROW-2211
>                 URL: https://issues.apache.org/jira/browse/ARROW-2211
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Antoine Pitrou
>            Priority: Major
>             Fix For: 0.12.0
>
>
> We are using a relatively complex hash function on 32- and 64-bit integers. A simpler hash with fewer CPU instructions should be sufficient for our needs



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