import collections

import functools

import time

@functools.lru_cache(maxsize=200)

def count_words(sentence):

_count = collections.Counter()

for w in str(sentence).split():

_count[w] += 1

return _count

if __name__ == "__main__":

sen = """In mathematics, computer science and physics,

a deterministic system is a system in which no

randomness is involved in the development of future states of the system"""

times = []

for i in range(3):

start_time = time.perf_counter()

count = count_words(sen)

stop_time = time.perf_counter()

time_taken = stop_time-start_time

times.append(time_taken)

print("Exec #{} time: {:.9f} performance gain {:%}".format(i, time_taken, 1-times[i]/times[0]))