alamb opened a new pull request, #21285:
URL: https://github.com/apache/datafusion/pull/21285

   ## Which issue does this PR close?
   
   - part of https://github.com/apache/datafusion/issues/20529
   - Broken out of https://github.com/apache/datafusion/pull/20820
   
   ## Rationale for this change
   
   We are try to be explicit about CPU and IO in the Parquet reader, however, 
the code for applying bloom filters still did both CPU and IO in the same future
   
   ## What changes are included in this PR?
   1. Split the states for IO and CPU work when applying bloom filters
   
   ## Are these changes tested?
   
   Functionally by existing tests
   
   (TODO) I also ran performance tests and they didn't show any substantial 
performance change
   
   ## Are there any user-facing changes?
   
   No, this is internal code reorganization
   


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