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Posted to issues@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/05/29 05:47:00 UTC

[jira] [Updated] (ARROW-8844) [C++] Optimize TransferBitmap unaligned case

     [ https://issues.apache.org/jira/browse/ARROW-8844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-8844:
----------------------------------
    Labels: pull-request-available  (was: )

> [C++] Optimize TransferBitmap unaligned case
> --------------------------------------------
>
>                 Key: ARROW-8844
>                 URL: https://issues.apache.org/jira/browse/ARROW-8844
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Yibo Cai
>            Assignee: Yibo Cai
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> TransferBitmap(CopyBitmap, InvertBitmap) unaligned case is processed bit-by-bit[1]. Similar trick in this PR[2] may also be helpful here to improve performance by processing in words.
> [1] https://github.com/apache/arrow/blob/e5a33f1220705aec6a224b55d2a6f47fbd957603/cpp/src/arrow/util/bit_util.cc#L121-L134
> [2] https://github.com/apache/arrow/pull/7135



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