nuno-faria commented on PR #20047:
URL: https://github.com/apache/datafusion/pull/20047#issuecomment-4231834426

   > There seem to be reproducible slowdowns
   
   ```
   
┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
   ┃ Query     ┃                                  HEAD ┃                      
file-stats-cache ┃        Change ┃
   
┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
   │ QQuery 0  │          1.30 / 4.72 ±6.59 / 17.91 ms │        16.67 / 16.91 
±0.33 / 17.54 ms │  3.58x slower │
   ```
   
   The first query in clickbench is a simple `count(*)`, which should complete 
immediately after getting the statistics as far as I'm aware. @mkleen I would 
start by checking if the statistics are being collected in the benchmark. Maybe 
the cache is not enabled there.


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