gistfile1.txt

import timeit

def array123(arr):
    return ''.join(list(map(str,arr))).find('123') >= 0

def array123_noob(arr):
    stack = [0,0,0]
    for num in arr:
        stack.append(num)
        stack.pop(0)
        if (stack == [1,2,3]):
            return True
    return False

print(timeit.timeit('array123([1, 1, 2, 3, 1])', globals=globals()))
print(timeit.timeit('array123_noob([1, 1, 2, 3, 1])', globals=globals()))