execution time with global variables

Peter Otten __peter__ at web.de
Fri Jul 2 12:49:00 CEST 2004


Peter Otten wrote:

> As a dumb "better than nothing" recipe I suggest you bundle the globals in
> a Bunch-like class and pass that explicitly to your functions, or convert
> the functions into methods and keep the "global" state as instance
> attributes.

Of course this is even slower:

<time_global.py continued>
class C:
    pass

def h(c):
    c.x = 1
    c.x
    c.x
    c.x
    c.x
    c.x
    c.x
    c.x
    c.x
    c.x
    c.x
</time_global.py>

$ timeit.py -s"from time_global import h, C" -s"c=C()" "h(c)"
1000000 loops, best of 3: 1.94 usec per loop

Peter




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