from functools import lru_cache from time import sleep from timeit import timeit @lru_cache(maxsize=None) def some_function(some_value): sleep(1) return some_value * 2 def do_range(): for j in range(0, 10): ret = some_function(j) print("Round 1 (Nothing Memoized):", timeit("do_range()", setup="from __main__ import do_range")) print("Round 2 (Memoized):", timeit("do_range()", setup="from __main__ import do_range"))