Dandandan commented on PR #20665:
URL: https://github.com/apache/datafusion/pull/20665#issuecomment-4010236406

   ```│ QQuery 23 │ 25151.55 ms │             11723.85 ms │ +2.15x faster │```
   
   @alamb btw this was the query I was talking about...
   
   * Is 2-3 times slower 50% of the time
   * It is *always* the left/main branch which is slower.
   * Sometimes some other queries show similar issues for the main branch
   
   When running locally, I don't have the problem...
   I think because it's the most IO heavy one, it must be something related to 
IOPs, swapping...


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