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https://issues.apache.org/jira/browse/ARROW-2211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-2211.
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Resolution: Fixed
Resolved by
https://github.com/apache/arrow/commit/eaf8d32e5f292dca0aa5b5508041d5d39406224d
> [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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