friendlymatthew opened a new pull request, #9285:
URL: https://github.com/apache/arrow-rs/pull/9285

   # Rationale for this change
   
   - Related to https://github.com/apache/arrow-rs/pull/9226
   
   This PR adds a set of benchmarks for the row group index reader to measure 
virtual column perf across different scenarios
   
   The benchmarks test single row group reads (the common case when using row 
group filtering) and multiple row group reads. It also tests varying row counts 
(100k to 5M rows) and different # of row groups (2 to 20)
   


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