What do you think about this approach?: make a lookup table for all powers of four!


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    S

    Re: fastest C++ code
    A fellow coder, made a switch/case clause and switched between all possible powers of four. For a 32 bits integer, there are only 16 of them! Personally I think this is the correct way of checking if a number is power of four, if our code is assumed to be run millions of times and performance matters. What are your thoughts?


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