[ https://issues.apache.org/jira/browse/ARROW-15854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated ARROW-15854: ----------------------------------- Labels: pull-request-available (was: ) > [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 > Time Spent: 10m > 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 -- This message was sent by Atlassian Jira (v8.20.1#820001)