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Posted to jira@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/06/15 09:30:00 UTC
[jira] [Updated] (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 ]
ASF GitHub Bot updated ARROW-9131:
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Labels: pull-request-available (was: )
> [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
> Priority: Major
> Labels: pull-request-available
> Time Spent: 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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