emkornfield commented on pull request #7885:
URL: https://github.com/apache/arrow/pull/7885#issuecomment-682300209


   > With the vectorized round_int32_int32, why are we passing -5 as the second 
argument? Would be glad if you could clarify.
   
   I wanted to verify that with a static value, the function could get the 
multiplications necessary vectorized, since I believe this is the common case, 
-5 was arbitrary.  With a variable value it does not appear that the 
multiplications get vectorized.


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