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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/09/03 03:34:04 UTC

[GitHub] [arrow] jianxind commented on pull request #8103: ARROW-9904: [C++] Unroll the loop of CountSetBits.

jianxind commented on pull request #8103:
URL: https://github.com/apache/arrow/pull/8103#issuecomment-686230245


   Below is the results on the new count benchmark for two devices on gcc and clang.
   
   
   CLX   8280L | gcc default | gcc unrolled | gcc speed up | clang default | clang unrolled | clang speed up
   -- | -- | -- | -- | -- | -- | --
   Count   benchmark(G/s) | 662.234 | 813.84 | 1.23 | 576.81 | 815.193 | 1.413278203
   
   
   i7-8700 | gcc default | gcc unrolled | gcc speed up | clang default | clang unrolled | clang speed up
   -- | -- | -- | -- | -- | -- | --
   Count   benchmark(G/s) | 622.174 | 736.495 | 1.18 | 559.015 | 743.022 | 1.329162903
   
   


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