Testing multithreading

multi_thread_test.py

import multiprocessing
import time

def f(x):
    for i in range(10**6):
        x += i/x
    return x

def main(n):
    with multiprocessing.Pool(n) as p:
        p.map(f, task)

if __name__ == '__main__':
    print('cpu:', multiprocessing.cpu_count())
    task = [i+1 for i in range(32)]
    for i in range(1, 33):
        s = time.clock()
        main(i)
        print(i, time.clock() - s)