Yibo Cai created ARROW-15854:
--------------------------------
Summary: [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
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
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
