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

     [ https://issues.apache.org/jira/browse/ARROW-553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rok Mihevc updated ARROW-553:
-----------------------------
    External issue URL: https://github.com/apache/arrow/issues/16190

> 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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