multiply multiple matrices simultaneously

Python
I would like to multiply multiple matrices simultaneously with numpy or pytorch without using a for loop.

For example, suppose you have five different matrices of 10x100 and one matrix of 100x100.

import numpy as np
a=np.random.rand(5,10,100)
b=np.random.rand(100,100)

Five different matrices where a is 10x100 and b is 100x100.

c=np.zeros(5,10,100))
for i in range (len(a)) :
    c[i] = np.dot(a[i], b)

Or you can use pytorch to

import torch
c=torch.zero((5,10,100))
a=torch.randn(5,10,100)
b=torch.randn(100,100)
for i in range (len(a)) :
    c[i]=torch.mm(a[i],b)

I would appreciate it if you could let me know if you have any ideas.

You can do it with a for statement like this, but if the number of a increases from 5, it will be delayed.
Matrix b is the same thing, so I would like to multiply the matrix in parallel.