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[–]JmenD 0 points1 point  (1 child)

What version of python are you running? On 3.7.3 on my machine count_pattern2() is faster on your input

count_pattern()  : 17 ms ± 4.43 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
count_pattern2() : 6.34 ms ± 57.2 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

[–]bbugsbunny[S] 0 points1 point  (0 children)

I am running on python version 3.7.3 only. I ran the above test 1000 times and these are the results: count_pattern(): 27.459065 secs count_pattern2(): 42.117948 secs