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Posted to dev@arrow.apache.org by "Yibo Cai (Jira)" <ji...@apache.org> on 2020/05/18 09:10:00 UTC

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

Yibo Cai created ARROW-8844:
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             Summary: [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


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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