pitrou commented on pull request #8320: URL: https://github.com/apache/arrow/pull/8320#issuecomment-704491476
For the record, if I profile `BM_ReadStructOfListColumn/50`, I get the following hot spots (in cycles spent): * ~19% in `DefRepLevelsToListInfo` * ~15% in `DelimitRecords` * ~11% in `BitRunReader::NextRun` * ~10% in `SpacedExpand` * ~6% in `DictionaryConverter<int>::Copy` * ~5% in `PathWriteContext::AppendRepLevels` And `ExtractBitsSoftware` (the PEXT emulation) only takes ~1.1%, which seems good enough for now. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
