def multithread_render():
mapniker = create_cartographer('mapnik',
theme='./input/world.xml',
image_type='png')
threads = list()
for i in range(4):
thread = threading.Thread(target=render, args=(i, mapniker,))
threads.append(thread)
thread.start()
for thread in threads:
thread.join()
def benchmark():
envelope = (-180, -85, 180, 85)
size_list = [(256, 256), (512, 512), (1024, 1024), (2048, 2048)]
mapniker = create_cartographer('mapnik',
theme='./input/world.xml',
image_type='jpeg')
output_dir = r'output/mapnik_benchmark'
if os.path.exists(output_dir):
shutil.rmtree(output_dir)
os.mkdir(output_dir)
for size in size_list:
output = os.path.join(output_dir, 'world_%dx%d.jpg' % size)
with Timer():
data = mapniker.render(envelope, size)
with open(output, 'wb') as fp:
shutil.copyfileobj(data, fp)
data.close()