# ch12/example7.py

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.')