Hello, everyone!

## How to calculate a multiplication of two matrices efficiently?

I want to calculate the product of two matrices. This could be done, of course, by using the intrinsic function MATMUL(A,B) where A and B are two matrices. But I found this is not very efficient, especially for large matrices, e.g. two 1000-by-1000 matrices.

Could anyone give me some suggestions on doing the multiplication EFFICIENTLY? Thank you in advance!