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https://issues.apache.org/jira/browse/ARROW-607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15903668#comment-15903668
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Robert Nishihara commented on ARROW-607:
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I believe this is already done in ARROW-553
https://github.com/apache/arrow/commit/ad0157547a4f5e6e51fa2f712c2ed9477489a20c.
We cherry-picked the some components of ARROW-553 in our fork because we're
pretty far behind the Arrow master at the moment.
> [C++] Speed up bitsetting in ArrayBuilder::UnsafeSetNotNull
> -----------------------------------------------------------
>
> Key: ARROW-607
> URL: https://issues.apache.org/jira/browse/ARROW-607
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
>
> see, e.g. https://github.com/pcmoritz/arrow/pull/3
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