Demonstration of Python multiprocessing map

multi-map.py

import time

from multiprocessing.dummy import Pool

with Pool() as p:
    start = time.time()
    print("Starting fast map...", end="")
    p.map(lambda _: time.sleep(.01), range(1000))
    print("Took %0.2f seconds\n" % (time.time() - start))

start = time.time()
print("Starting slow map...", end="")
list(map(lambda _: time.sleep(.01), range(1000)))
print("Took %0.2f seconds\n" % (time.time() - start))