cyb70289 opened a new pull request #9604: URL: https://github.com/apache/arrow/pull/9604
Variance kernel suffers from round-off errors due to naive summation. This patch implements pairwise summation algorithm to improve variance kernel precision. Pairwise summation also results to better performance for normal cases. - ~1x improvement for 0.01%, 0% null count - moderate improvement for 1% null count - ~0.5x drop for 10%, 50% null count ---------------------------------------------------------------- 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
