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Posted to jira@arrow.apache.org by "Rok Mihevc (Jira)" <ji...@apache.org> on 2023/01/11 07:10:03 UTC

[jira] [Commented] (ARROW-553) C++: Faster valid bitmap building

    [ https://issues.apache.org/jira/browse/ARROW-553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17657587#comment-17657587 ] 

Rok Mihevc commented on ARROW-553:
----------------------------------

This issue has been migrated to [issue #16190|https://github.com/apache/arrow/issues/16190] on GitHub. Please see the [migration documentation|https://github.com/apache/arrow/issues/14542] for further details.

> C++: Faster valid bitmap building
> ---------------------------------
>
>                 Key: ARROW-553
>                 URL: https://issues.apache.org/jira/browse/ARROW-553
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Uwe Korn
>            Assignee: Uwe Korn
>            Priority: Major
>             Fix For: 0.2.0
>
>
> Currently we build up the bitmaps bit-by-bit which takes very long. Instead we can build them byte-by-byte in the general case and use {{memset}} for the non-null case.



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