steveniemitz commented on PR #22103:
URL: https://github.com/apache/beam/pull/22103#issuecomment-1178186588

   > The overhead that I see isn't the sampler but the cost of producing an 
output and sending it to the next fused transform.
   > 
   > 
   > 
   > For trivial DoFns the overhead can be as high as 50% of the CPU time for 
processing an element.
   
   Oh yeah totally, I think this is great stuff, sorry I didn't mean to imply 
otherwise.
   
   


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