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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2020/06/15 12:32:00 UTC
[jira] [Assigned] (ARROW-9131) [C++] Faster ascii_lower and
ascii_upper
[ https://issues.apache.org/jira/browse/ARROW-9131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Antoine Pitrou reassigned ARROW-9131:
-------------------------------------
Assignee: Maarten Breddels
> [C++] Faster ascii_lower and ascii_upper
> ----------------------------------------
>
> Key: ARROW-9131
> URL: https://issues.apache.org/jira/browse/ARROW-9131
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Maarten Breddels
> Assignee: Maarten Breddels
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> The current version is using a lookup table for doing the case conversion. Using [http://quick-bench.com/JaDErmVCY23Z1tu6YZns_KBt0qU] it seems using a boolean check and +/-32 seems ~5x times faster (4.6x for clang 9, 6.4x for GCC 9.2).
>
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