asolimando commented on PR #26816:
URL: https://github.com/apache/datafusion/pull/26816#issuecomment-6453223610

   > > Also, both runs compare against a baseline with 
enable_rle_to_dictionary=true, which is off by default. It would help to also 
show the branch against the default config, so we know how far dictionary reads 
still are from plain strings after this change.
   > 
   > Yes, this is intentional. Initially, some benchmarks were 5x slower than 
main, which made it hard to see what was moving the needle in a positive 
direction when comparing directly against main.
   > 
   > The end goal is to be faster than main, which uses utf8Views, but there’s 
still a decent chunk of work to go. So as I iterate, I’m comparing my 
dictionary encoding optimizations against dictionary encoding on main. Once the 
benchmark results are closer, I’ll compare against main directly.
   
   OK, so this is the "isolate only one variable at the time in benchmarks" 
angle we discussed offline, that's totally fine, thanks for the clarification!


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