nuno-faria commented on PR #11830:
URL: https://github.com/apache/arrow-rs/pull/11830#issuecomment-6372298066

   > i'm confused as to how this could be causing a slowdown.
   > 
   > could you share an example?
   
   @Rich-T-kid I have an example with DataFusion here: 
https://github.com/apache/datafusion/issues/26606. In that case there was a 
query that spent ~97% of the CPU time in the `set_source` func.


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