from threading import Thread
import time

def writenums(f, n):
    start = time.time()
    for x in range(n):
        f.write("%d\n" % x)
    end = time.time()
    print(end-start)


def spun(name, n):
    while n > 0:
        n -= 1
        if n % 100000 == 0:
            d[name] = n

d = {}

def spin(name):
    t0 = time.time()
    for i in range(1000000):
        spun(name, 2000000)
        print (name, time.time() - t0, i) #, repr(d))

threads = [
    Thread(target = spin, args = ('t1',)),
    Thread(target = spin, args = ('t2',)),
    #Thread(target = spin, args = ('t3',)),
    #Thread(target = spin, args = ('t4',)),
    #Thread(target = spin, args = ('t5',)),
    #Thread(target = spin, args = ('t6',)),
]

for t in threads:
    t.daemon = True
    t.start()

# With line buffering
writenums(open("./nums", "w", 1), 1000000)