alamb opened a new issue, #8847:
URL: https://github.com/apache/arrow-rs/issues/8847

   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   
   After the great work from @hhhizzz  in 
https://github.com/apache/arrow-rs/pull/8733, we will (finally) have the 
ability to use a Bitmask filter representation when applying filters *during* 
Parquet decode. 
   
   During review, one thing we noticed is that the code that is used to convert 
a RowSelection to a Mask could likely be optimized more
   
   
https://github.com/apache/arrow-rs/blob/911331aafa13f5e230440cf5d02feb245985c64e/parquet/src/arrow/arrow_reader/selection.rs#L926-L933
   
   
   
   
   **Describe the solution you'd like**
   
   Make predicate evaluation faster by optimizing the conversion to mask
   
   **Describe alternatives you've considered**
   @hhhizzz mentions on  
https://github.com/apache/arrow-rs/pull/8733#discussion_r2479030505
   
   > I'll learn the [#6624 
(comment)](https://github.com/apache/arrow-rs/pull/6624#discussion_r2127391600) 
and try to improve it in the following PRs.
   
   Aka that @XiangpengHao 's PR here has many tricks to use
   - https://github.com/apache/arrow-rs/pull/6624
   
   **Additional context**
   <!--
   Add any other context or screenshots about the feature request here.
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