Yibo Cai created ARROW-8537: ------------------------------- Summary: [C++] Performance regression from ARROW-8523 Key: ARROW-8537 URL: https://issues.apache.org/jira/browse/ARROW-8537 Project: Apache Arrow Issue Type: Bug Reporter: Yibo Cai
I optimized BitmapReader in [this PR|https://github.com/apache/arrow/pull/6986] and see performance uplift of BitmapReader test case. I didn't check other test cases as this change looks trivial. I reviewed all test cases just now and see big performance drop of 4 cases, details at [PR link|https://github.com/apache/arrow/pull/6986#issuecomment-616915079]. I also compared performance of code using BitmapReader, no obvious changes found. Looks we should revert that PR. -- This message was sent by Atlassian Jira (v8.3.4#803005)