processes.py

import time
from multiprocessing import Process

def ask_user():
    start = time.time()
    user_input = input('Enter your name: ')
    greet = f'Hello, {user_input}'
    print(greet)
    print(f'ask_user', time.time() - start)
    
def complex_calculation():
    start = time.time()
    print('Started calculating......')
    [x**2 for x in range(20000000)]
    print(f'complex_calculation', time.time() - start)
   
start = time.time() 
ask_user()
complex_calculation()
print(f'Single thread total time:', time.time() - start)

process = Process(target=complex_calculation)
process2 = Process(target=complex_calculation)
process.start()
process2.start()

start = time.time()


process.join()
process2.join()

print(f'Single thread total time:', time.time() - start, '\n\n')