mapnik/tests/python_tests/image_encoding_speed_test.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os, mapnik
from timeit import Timer, time
from utilities import execution_path, run_all

def setup():
    # All of the paths used are relative, if we run the tests
    # from another directory we need to chdir()
    os.chdir(execution_path('.'))

combinations = ['png',
                'png8',
                'png8:m=o',
                'png8:m=h',
                'png8:m=o:t=0',
                'png8:m=o:t=1',
                'png8:m=o:t=2',
                'png8:m=h:t=0',
                'png8:m=h:t=1',
                'png8:m=h:t=2',
                'png:z=1',
                'png:z=1:t=0', # forces rbg, no a
                'png8:z=1',
                'png8:z=1:m=o',
                'png8:z=1:m=h',
                'png8:z=1:c=1',
                'png8:z=1:c=24',
                'png8:z=1:c=64',
                'png8:z=1:c=128',
                'png8:z=1:c=200',
                'png8:z=1:c=255',
                'png8:z=9:c=64',
                'png8:z=9:c=128',
                'png8:z=9:c=200',
                'png8:z=1:c=50:m=h',
                'png8:z=1:c=1:m=o',
                'png8:z=1:c=1:m=o:s=filtered',
                'png:z=1:s=filtered',
                'png:z=1:s=huff',
                'png:z=1:s=rle',
                'png8:m=h:g=2.0',
                'png8:m=h:g=1.0',
                'png:e=miniz',
                'png8:e=miniz'
               ]

tiles = [
'blank',
'solid',
'many_colors',
'aerial_24'
]

iterations = 10

def do_encoding():

    global image

    results = {}
    sortable = {}

    def run(func, im, format, t):
        global image
        image = im
        start = time.time()
        set = t.repeat(iterations,1)
        elapsed = (time.time() - start)
        min_ = min(set)*1000
        avg = (sum(set)/len(set))*1000
        name = func.__name__ + ' ' + format
        results[name] = [min_,avg,elapsed*1000,name,len(func())]
        sortable[name] = [min_]

    if 'blank' in tiles:
        def blank():
            return eval('image.tostring("%s")' % c)
        blank_im = mapnik.Image(512,512)
        for c in combinations:
            t = Timer(blank)
            run(blank,blank_im,c,t)

    if 'solid' in tiles:
        def solid():
            return eval('image.tostring("%s")' % c)
        solid_im = mapnik.Image(512,512)
        solid_im.fill(mapnik.Color("#f2efe9"))
        for c in combinations:
            t = Timer(solid)
            run(solid,solid_im,c,t)

    if 'many_colors' in tiles:
        def many_colors():
            return eval('image.tostring("%s")' % c)
        # lots of colors: http://tile.osm.org/13/4194/2747.png
        many_colors_im = mapnik.Image.open('../data/images/13_4194_2747.png')
        for c in combinations:
            t = Timer(many_colors)
            run(many_colors,many_colors_im,c,t)

    if 'aerial_24' in tiles:
        def aerial_24():
            return eval('image.tostring("%s")' % c)
        aerial_24_im = mapnik.Image.open('../data/images/12_654_1580.png')
        for c in combinations:
            t = Timer(aerial_24)
            run(aerial_24,aerial_24_im,c,t)

    for key, value in sorted(sortable.iteritems(), key=lambda (k,v): (v,k)):
        s = results[key]
        min_ = str(s[0])[:6]
        avg = str(s[1])[:6]
        elapsed = str(s[2])[:6]
        name = s[3]
        size = s[4]
        print 'min: %sms | avg: %sms | total: %sms | len: %s <-- %s' % (min_,avg,elapsed,size,name)


if __name__ == "__main__":
    setup()
    do_encoding()
    exit(run_all(eval(x) for x in dir() if x.startswith("test_")))