添え字指定でのランダムアクセスを繰り返すようなアルゴリズムに関してはnumpy.arrayにするよりリストのままの方が速い

In [71]: %%timeit
    ...: xs = np.zeros(100)
    ...: xs[0]
    ...: 
696 ns ± 4.94 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)

In [72]: %%timeit
    ...: xs = [0] * 100
    ...: xs[0]
    ...: 
416 ns ± 3.79 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)

nishio

 696 ns ± 4.94 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)

 416 ns ± 3.79 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)

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