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https://issues.apache.org/jira/browse/ARROW-8844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-8844.
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Fix Version/s: 1.0.0
Resolution: Fixed
Issue resolved by pull request 7300
[https://github.com/apache/arrow/pull/7300]
> [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
> Fix For: 1.0.0
>
> Time Spent: 4.5h
> 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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