Dimchikkk commented on PR #13364:
URL: https://github.com/apache/datafusion/pull/13364#issuecomment-2469020556

   > Thanks @Dimchikkk for your contribution. Do you mean the Entry API 
misbehaved returning Vacant all the time and forced the regexp pattern to be 
recompiled?
   
   Hi @comphead ,
   No, I haven't found out the root cause why the code using Entry API less 
performant. I went from another angle... looking into regexp_replace source 
file (that was like 50% faster) and trying to do things in a similar way & 
benchmark it.... so I basically rewrote the function that inserts into the 
cache. 


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