python：检测numpy中的矩阵乘法耗时情况

import time
import numpy as np 

a = np.random.random((5000,5000))

t1 = time.time()
b = np.matmul(a, a)
t2 = time.time()

print(t2-t1)

本人电脑耗时稳定在4s-5s之间

tic
a = rand(5000,5000);
b = a * a;
toc

matlab的耗时也在4s-5s之间, 两者相差不大