pepijnve commented on PR #16196:
URL: https://github.com/apache/datafusion/pull/16196#issuecomment-2948268910

   @zhuqi-lucas @alamb I wanted to work on measuring the performance impact of 
this PR today, but looking at 
https://github.com/apache/datafusion/pull/16262#pullrequestreview-2903139531 
I'm a bit surprised to see similar variability being reported as I'm seeing in 
the benchmark results of my own experimental branch. For PR 16262 no changes 
were made to the production code but you still see performance deltas. This 
begs the question how the benchmarks can/should be used to evaluate code 
changes. How are you guys making use of these results? Should I be using 
something else for coarse grained performance impact assessment?


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