[jira] [Commented] (ARROW-1928) [C++] Add benchmarks comparing performance of internal::BitmapReader/Writer with naive approaches

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16444108#comment-16444108 ] 

ASF GitHub Bot commented on ARROW-1928:
---------------------------------------

pitrou opened a new pull request #1915: ARROW-1928: [C++] Add BitmapReader/BitmapWriter benchmarks
URL: https://github.com/apache/arrow/pull/1915
 
 
   Also improve the BitmapWriter implementation (around 18% faster here - on Ubuntu 16.04 with gcc 4.9).
   
   I experimented with a different implementation for BitmapReader (storing the bit mask instead of the bit offset), but it came out surprisingly slower.

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> [C++] Add benchmarks comparing performance of internal::BitmapReader/Writer with naive approaches
> -------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-1928
>                 URL: https://issues.apache.org/jira/browse/ARROW-1928
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.10.0
>
>
> The performance may also vary across platforms/compilers. This would be helpful to know how much they help



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