zuochunwei commented on pull request #8193:
URL: https://github.com/apache/incubator-doris/pull/8193#issuecomment-1048421408


   > what is the test result? how much does `final` faster than non-final ?
   
   call non-final virtual function's cost by subclass instance is same to 
virtual function calling
   when add final key-word, call virtual function by subclass instance is same 
to normal function calling
   
   the test result: 18000 VS 1000


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