The Cost of Dynamism (was Re: Pyhon 2.x or 3.x, which is faster?)

[Paul Rubin]

BartC <bc at freeuk.com> writes:
> def case(*args):
>     return any((arg == switch.value for arg in args))

def case(values): 
    return switch.value in values

> I used it in my benchmark to replace the if-else chain checking three
> lots of ranges:
>
> switch(c)
> if case(ord("A"),ord("B"),ord("C"),ord("D"),ord("E"),ord("F"),
>         ord("G"),ord("H"),ord("I"),ord("J"),ord("K"),ord("L"),
>         ord("M"),ord("N"),ord("O"),ord("P"),ord("Q"),ord("R"),
>         ord("S"),ord("T"),ord("U"),ord("V"),ord("W"),ord("X"),
>         ord("Y"),ord("Z")):
>     upper+=1

Use a set instead of a big tuple:

    uppers = { ord("A"), ord("B"), ... ord("Z") }
    ...
    if case(uppers):
       upper += 1