Tuples performance test

import timeit

COUNT = 1000
CITIES = []

for i in range(COUNT):
    CITIES.append("city_" + str(i))

def testWithoutTuples(cities):
    res = 0
    for city in cities:
        res += 1

    return res

def testWithTuples(cities):
    res = 0
    for index, city in enumerate(cities):
        res += 1

    return res

print(timeit.timeit('testWithoutTuples(CITIES)', globals=globals())) # 45.13318726621658
print(timeit.timeit('testWithTuples(CITIES)', globals=globals())) # 71.42498460450689