[GitHub] [incubator-doris] imay commented on pull request #4366: Optimise coding bit operation in BE

[GitBox <gi...@apache.org>]

imay commented on pull request #4366:
URL: https://github.com/apache/incubator-doris/pull/4366#issuecomment-675370532


   > > Not intended to interfere, just curious about how many improvements can be achieved from this PR, are there any benchmarks?
   > 
   > In my develop computure, when encode_varint64 execute 1 billion times. `v | B` version averagely uses 95095ms in 5 times.
   > `(v & (B - 1))` version averagely uses 96103ms in 5 times. It can improve aboat 0.5% ～ 1%. Encode_varint64 is used high frequency in many cases like bitmap_value, page_pointer encode and so on.
   
   It seems too slow to execute 5 bilion enocde operation in about 95s 


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