antirez/redis — pull request #1715 by dlutxx (2014-04-30 03:56:18+00:00)
Title: make hex_digit_to_int short and save one variable in sdsjoin

I think `hex_digit_to_int` will be faster with 3 if statements and simple math, and saving one variable in `sdsjoin` may improve performance.

Correct me if I am wrong.