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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/05/29 12:48:20 UTC

[GitHub] [arrow] fsaintjacques commented on pull request #7285: ARROW-8843: [C++] Compare bitmaps in words

fsaintjacques commented on pull request #7285:
URL: https://github.com/apache/arrow/pull/7285#issuecomment-635953947


   > NOTE: This patch may hurt performance if two bitmaps differ at the very
   > begining bits, as it always loads and compares 64 bits if possible. Bit
   > by bit comparison will notice the difference and return false earlier.
   > This should not be a problem in practice.
   
   This should be negligible in practice. The processor still load in unit of words.


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