Antoine Pitrou created ARROW-13769:
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Summary: [C++] BitmapAnd, BitmapOr... could return the number of
set bits
Key: ARROW-13769
URL: https://issues.apache.org/jira/browse/ARROW-13769
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Antoine Pitrou
When updating a validity bitmap using a bitwise operation such as AND or OR, it
can be useful to also know the new validity count. It is probably costless to
compute the new popcount inside BitmapAnd and friends. Micro-benchmarks will
have to be run to validate that assumption.
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