np.dot vs blas.ddot

ddot.py

import numpy as np
import perfplot
from scipy.linalg.blas import ddot


def np_dot(data):
    x, y = data
    return np.dot(x, y)


def sp_ddot(data):
    x, y = data
    return ddot(x, y)


b = perfplot.bench(
    setup=lambda n: np.random.rand(2, n),
    kernels=[np_dot, sp_ddot],
    n_range=[2 ** k for k in range(24)],
)
b.save("out.png")
b.show()