mbutrovich commented on issue #3978:
URL: 
https://github.com/apache/datafusion-comet/issues/3978#issuecomment-4660914029

   Iceberg looks okay. I think the Parquet regression is due to do 
https://github.com/apache/datafusion-comet/pull/3755 which doesn't cache page 
indexes, so we're downloading them over and over.
   
   For Iceberg, Q72 has a concerning regression that I'll try to characterize 
today.
   
   <img width="3500" height="1000" alt="Image" 
src="https://github.com/user-attachments/assets/8b32d87f-48fb-4b0f-9c60-942acd5f0c94";
 />
   <img width="3500" height="600" alt="Image" 
src="https://github.com/user-attachments/assets/0fec2b54-fb5e-420a-b5ba-735701b1f9b2";
 />


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