If B is 50% dense then store it in a dense format. It will be much faster and the extra memory is minimal. Even 30% dense.
Barry On May 14, 2012, at 5:13 AM, Hui Zhang wrote: > I have two matrices A and B stored in sparse format. While A is really > sparse, B is relatively > dense (say non-zeros entries about 50%). Now to multiply the two matrices, > among > > A*B > or > (B^T * A^T)^T > > which is better, or no big difference ? > > Thanks! >
