Renting CPU time for a Python script

[Chris Liechti]

zbortolo at vt.edu (Zachary Bortolot) wrote in
news:25c15ddd.0207201216.46eddd73 at posting.google.com: 
> Unfortunately the bottleneck
> in my program lies with the PIL extension since I have to perform a
> lot of putpixel and getpixel operations, which are quite expensive in
> PIL.  

numpy/Numeric is very efficient on vectors and matrices. maybe you could 
convert the image, or parts of it, to a matrix and use Numeric to process 
it.
function calls are relatively expensive, when you can formulate your 
algorithm with numpy you'll get the loop over the elements/pixels in C for 
free, which should give you some speedup (>>2).

chris

-- 
Chris <cliechti at gmx.net>