alamb commented on issue #16365:
URL: https://github.com/apache/datafusion/issues/16365#issuecomment-3044943658

   > I observed a significant performance improvement just testing on the 
master branch without any metadata caching as compared to before. I don't know 
what change caused this? Any idea.
   
   It is almost certainly due to 
https://datafusion.apache.org/library-user-guide/upgrading.html#datafusion-execution-collect-statistics-now-defaults-to-true


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