erratic-pattern opened a new pull request, #10475:
URL: https://github.com/apache/datafusion/pull/10475

   This is an experiment to see if reducing string allocations with `Cow` has 
any performance improvement.
   
   My local benchmarks show mixed results. My guess is that there is a small 
additional overhead due to branching when destructuring the `Cow` enum. 
   
   It might be worthwhile to further split these changes into individual 
branches to target benchmarks on specific changes instead of testing all of 
them at once.


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