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Fri Apr 6 09:49:24 EDT 2001 · http://mail.python.org/pipermail/python-list/2001-April/112563.html

Eugene Leitl wrote:
> Seriously, what is roughly the overhead of the Python glue
> if I have a scripted sequence of 1) grabbing a frame from /dev/video
> 2) doing some processing on it 3) displaying it.
>
> Assuming 1, 2, 3 is written in C (I guess displaying a canvass will
> involve some Python), is the overhead relevant?

why not try it?

import time

def test():
    func = abs # some trivial C function
    t0 = time.time()
    for i in range(1000000):
        func(0) # call C code to grab a frame
        func(0) # call C code to process it
        func(0) # call C code to display it
    print "overhead:", (time.time() - t0) / 1000, "ms per frame"

test()

on a 700 MHz box, this prints:

    overhead: 0.00413600003719 ms per frame

Cheers /F

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