speed.py

import sys
import time

smth = [1, 3, 5, 1, 2, 56, 76, 3, 23]

square_list = [x ** x for x in smth]
print('sizeof list: {}'.format(sys.getsizeof(square_list)))

square_generator = (x ** x for x in smth)
print('sizeof generatoe: {}'.format(sys.getsizeof(square_generator)))

smth = range(10000)

s = time.time()
square_list = [x ** x for x in smth]
print('time list: {}'.format(time.time() - s))

s = time.time()
square_generator = (x ** x for x in smth)
print('time generatoe: {}'.format(time.time() - s))


---------------OUTUT---------------
sizeof list: 200
sizeof generatoe: 80
time list: 5.64923596382
time generatoe: 9.05990600586e-06
[Finished in 5.7s]
-----------------------------------