Multiplication of a Sparse Matrix With Diagonal Matrices

I have a sparse m x m square matrix L (which is actually a Laplacian matrix of a large graph) and an m x1 vector d. I want to create a diaognal matrix D whose diagonal is populated with the entries in d and then generate

normL = D * L * D

Currently, I am creating a sparse diaognal matrix as

D = spdiags(d, 0, m, m)

and then I use D * L * D.

I wonder whether there is a more efficient way to do this given that the (i, j)-th elements of normL and L are related by

normL(i, j) = D(i) * D(j) * L(i, j).

Thank you very much.