gil-challenge.py

PARALLEL = False
COUNT = 1000000000

import threading
import time

def count():
    n = COUNT
    while n > 0:
        n -= 1

if PARALLEL:
    t1 = threading.Thread(target=count)
    t1.start()
    t2 = threading.Thread(target=count)
    t2.start()
    t1.join()
    t2.join()
else:
    count()
    count()