[jira] [Updated] (ARROW-9842) [C++] Explore alternative strategy for Compare kernel implementation for better performance

["Alessandro Molina (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-9842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alessandro Molina updated ARROW-9842:
-------------------------------------
    Fix Version/s:     (was: 6.0.0)
                   7.0.0

> [C++] Explore alternative strategy for Compare kernel implementation for better performance
> -------------------------------------------------------------------------------------------
>
>                 Key: ARROW-9842
>                 URL: https://issues.apache.org/jira/browse/ARROW-9842
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>             Fix For: 7.0.0
>
>         Attachments: movemask-in-chunks.diff, movemask.patch
>
>
> The compiler may be able to vectorize comparison options if the bitpacking of results is deferred until the end (or in chunks). Instead, a temporary bytemap can be populated on a chunk-by-chunk basis and then the bytemaps can be bitpacked into the output buffer. This may also reduce the code size of the compare kernels (which are actually quite large at the moment)



--
This message was sent by Atlassian Jira
(v8.3.4#803005)