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https://issues.apache.org/jira/browse/ARROW-15854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yibo Cai resolved ARROW-15854.
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Fix Version/s: 8.0.0
Resolution: Fixed
Issue resolved by pull request 12574
[https://github.com/apache/arrow/pull/12574]
> [C++] Refine csv writer - populate columns in normal order
> ----------------------------------------------------------
>
> Key: ARROW-15854
> URL: https://issues.apache.org/jira/browse/ARROW-15854
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Yibo Cai
> Assignee: Yibo Cai
> Priority: Major
> Labels: pull-request-available
> Fix For: 8.0.0
>
> Time Spent: 3h 50m
> Remaining Estimate: 0h
>
> CSV writer populates columns in reverse order, each row is constructed from
> last cell to first cell.
> Populating columns in normal order makes the code easier to follow, and
> offers better optimization chances. E.g., EscapeReverse [1] is the hotspot
> for quoted string benchmark, it's hard to improve if chars are scanned in
> reverse order, but may benefit from simd if scanned in normal order.
> [1]
> https://github.com/apache/arrow/blob/master/cpp/src/arrow/csv/writer.cc#L141-L150
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