Exemplo de multiprocessamento

multi.py

import multiprocessing
import time
from multiprocessing import Pool, freeze_support

MAX_ITER = 9999999

def f1(a):
    c = 0
    for i in range(0, MAX_ITER):
        c += 1
    return 1

def f2(a):
    c = 0
    for i in range(0, MAX_ITER):
        c += 1
    return 1

if __name__ == '__main__':
    pool = Pool(multiprocessing.cpu_count())
    result1 = pool.apply_async(f1, [0])
    result2 = pool.apply_async(f2, [9])
    freeze_support()
    t0 = time.time()
    answer1 = result1.get(timeout=10)
    answer2 = result2.get(timeout=10)
    print(time.time() - t0)
    t0 = time.time()
    aa = f1(1)
    bb = f2(2)
    print(time.time() - t0)