andygrove opened a new issue, #19569:
URL: https://github.com/apache/datafusion/issues/19569

   ### Is your feature request related to a problem or challenge?
   
   There are numerous places in the code where `write!` is used in conjunction 
with format string `"{b:02x}"`. There are faster ways to write hex-encoded 
bytes.
   
   ### Describe the solution you'd like
   
   _No response_
   
   ### Describe alternatives you've considered
   
   _No response_
   
   ### Additional context
   
   _No response_


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