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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/05/26 06:42:44 UTC

[GitHub] [arrow-rs] Dandandan edited a comment on pull request #341: Fix filter UB and add fast path

Dandandan edited a comment on pull request #341:
URL: https://github.com/apache/arrow-rs/pull/341#issuecomment-848508866


   > I mean that we no longer need to try to prune expressions of the form `1 == 1`: they automatically get converted to trues, which amounts to a `O(1)` evaluation in the filter. (We may still do it to make the plan cleaner)
   
   👍 
   I am not sure the call is `O(1)`, the popcount/bitcount still has to be computed, no? Still faster than the other parts of course.


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