[wxpython-users] Fast(er) pixel level access

[Folkert Boonstra]

Just an update on how far i got with getting it faster.
Replacing loops with list comprehensions is a major enhancement:

    def applyRule(self, rule):
        # Apply the rule
        xdim = ydim = [d for d in range(DIM) if d>0 and d<(DIM-1)]
        xydims = [(x,y) for x in xdim for y in ydim]
        for xy in xydims:
            r = rule(self.imgs['b'], xy[0], xy[1])

At first:
> --------------------------------------------------------------------------------
> Wed Apr 23 22:22:11 2008    caprofile7
>
>          1943247 function calls in 14.565 CPU seconds
> --------------------------------------------------------------------------------
>   
Now:
----------------------------------------------------------------------------------------------------------------------------------------------------------------
Sat May  3 08:15:09 2008    caprofile11

         16257 function calls in 4.905 CPU seconds

   Ordered by: internal time

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    4.356    4.356    4.570    4.570
/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py:7219(MainLoop)
    15876    0.147    0.000    0.147    0.000
/home/folkert/workarea/cellularautomaton/dharana/wxCA/canumclass11.py:83(parity)
        1    0.101    0.101    0.101    0.101
/home/folkert/workarea/cellularautomaton/dharana/wxCA/canumclass11.py:200(initBitmap)
        4    0.079    0.020    0.079    0.020
/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_gdi.py:6105(GetFont)
        1    0.062    0.062    0.209    0.209
/home/folkert/workarea/cellularautomaton/dharana/wxCA/canumclass11.py:322(applyRule)
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