dmitry-chirkov-dremio commented on PR #49421:
URL: https://github.com/apache/arrow/pull/49421#issuecomment-3988215210

   Additional context from benchmarking expression evaluation for the scenario 
I was troubleshooting:
   
   LPAD+castVARCHAR
   - Before: LPAD(castVARCHAR(int)) = 1.85x overhead vs LPAD(string)
   - After:  LPAD(castVARCHAR(int)) = 1.59x overhead vs LPAD(string)
   - Improvement: ~14% reduction in castVARCHAR overhead
   
   3-column expression with nested LPAD/CASE/CONCAT:
   - Before: ~1350 ms
   - After:  ~857 ms
   - Improvement: ~37% faster


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