bench_cffi_access.py

from .helper import unittest, PillowTestCase, hopper

# Not running this test by default. No DOS against Travis CI.

from PIL import PyAccess

import time


def iterate_get(size, access):
    (w, h) = size
    for x in range(w):
        for y in range(h):
            access[(x, y)]


def iterate_set(size, access):
    (w, h) = size
    for x in range(w):
        for y in range(h):
            access[(x, y)] = (x % 256, y % 256, 0)


def timer(func, label, *args):
    iterations = 5000
    starttime = time.time()
    for x in range(iterations):
        func(*args)
        if time.time() - starttime > 10:
            print(
                "%s: breaking at %s iterations, %.6f per iteration"
                % (label, x + 1, (time.time() - starttime) / (x + 1.0))
            )
            break
    if x == iterations - 1:
        endtime = time.time()
        print(
            "%s: %.4f s  %.6f per iteration"
            % (label, endtime - starttime, (endtime - starttime) / (x + 1.0))
        )


class BenchCffiAccess(PillowTestCase):
    def test_direct(self):
        im = hopper()
        im.load()
        # im = Image.new( "RGB", (2000, 2000), (1, 3, 2))
        caccess = im.im.pixel_access(False)
        access = PyAccess.new(im, False)

        self.assertEqual(caccess[(0, 0)], access[(0, 0)])

        print("Size: %sx%s" % im.size)
        timer(iterate_get, "PyAccess - get", im.size, access)
        timer(iterate_set, "PyAccess - set", im.size, access)
        timer(iterate_get, "C-api - get", im.size, caccess)
        timer(iterate_set, "C-api - set", im.size, caccess)


if __name__ == "__main__":
    unittest.main()