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)