alamb commented on PR #10397:
URL: https://github.com/apache/arrow-rs/pull/10397#issuecomment-5084685135

   > the retained prefix is at least 64 KiB;
   the BooleanBuffer is unsliced; and
   the allocation is uniquely owned.
   
   
   This is an interesting idea -- and thank you for the report
   
   I expect many of the bitmaps that we are working with in datafusion and 
other downstream crates are batch_size bits (aka 8Kb) so this 


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