Yibo Cai created ARROW-16850: -------------------------------- Summary: [C++] Improve csv writer by copying data and delimiter separately Key: ARROW-16850 URL: https://issues.apache.org/jira/browse/ARROW-16850 Project: Apache Arrow Issue Type: Improvement Components: C++ Reporter: Yibo Cai Assignee: Yibo Cai
Profiling csv writer with Arm Statistical Profiling Extension (SPE) reveals there is relatively high branch misprediction rate from {{memcpy}}, due to interleaving copying data field and delimiter which is very short(1 or 2 chars). Copying delimiter with specific code, {{memcpy}} only the data field improves performance significantly. -- This message was sent by Atlassian Jira (v8.20.7#820007)