[petsc-users] MatMatMult vs series of MatMult

[Hong]

Bikash:
>
>
> I have sparse matrix of MATMPIAIJ format that needs to be multiplied with
> a series of vectors and the resultant set of vectors are to be stored into
> a matrix. I can do that in two ways:
>
> 1. Perform series of MatMult operations and store the resultant vectors in
> a MATMPIDENSE matrix; or
> 2. Store the vectors in a MATMPIDENSE matrix and perform a MatMatMult
> operation.
>

2 would be more efficient.

Hong
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