python：檢測numpy中的矩陣乘法耗時情況

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)

本人電腦耗時穩定在4s-5s之間

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

matlab的耗時也在4s-5s之間, 兩者相差不大