import threading

import time

from timeit import default_timer as timer

def thread_a():

print("Thread A is starting...")

print("Thread A is performing some calculation...")

time.sleep(2)

print("Thread A is performing some calculation...")

time.sleep(2)

def thread_b():

print("Thread B is starting...")

print("Thread B is performing some calculation...")

time.sleep(5)

print("Thread B is performing some calculation...")

time.sleep(5)

thread1 = threading.Thread(target=thread_a)

thread2 = threading.Thread(target=thread_b)

start = timer()

thread1.start()

thread2.start()

thread1.join()

thread2.join()

print("Took %.2f seconds." % (timer() - start))

print("Finished.")