def benchmark() -> None:
    from timeit import timeit

    setup = "from __main__ import is_pangram, is_pangram_faster, is_pangram_fastest"
    print(timeit("is_pangram()", setup=setup))
    print(timeit("is_pangram_faster()", setup=setup))
    print(timeit("is_pangram_fastest()", setup=setup))
    # 5.348480500048026, 2.6477354579837993, 1.8470395830227062
    # 5.036091582966037, 2.644472333951853,  1.8869528750656173