wesm opened a new pull request #7356: URL: https://github.com/apache/arrow/pull/7356
BinaryBitBlockCounter computes the popcount of the bitwise-and of each corresponding bit-run (with target of 64 bits at a time) of two bitmaps. This permits iterating through two validity bitmaps that don't have a lot of nulls much more quickly than using two BitmapReaders. I also added an inline-able BitBlockCounter::NextWordInline for 64-bits at a time for a single bitmap. It seems like this may be preferable to the four word version. Now we have `NextWord` and `NextFourWords` so the developer can choose either variant. Benchmarks and tests covering all this are included. I'll post the benchmarks on my machine as a comment. ---------------------------------------------------------------- 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: us...@infra.apache.org
