On Fri, Feb 18, 2011 at 19:48, Barry Smith <bsmith@mcs.anl.gov> wrote:

Can some of the VecAXPY() calls in loops in TS be replaced with single VecMAXPY() calls? For example

for (j=0; j<r; j++) {
ierr = VecAXPY(gl->Z,-shift*u[i*r+j],X[j]);CHKERRQ(ierr);
}

They can, but we would have to create a temporary array to hold the coefficients and run the loop to fill the coefficients into that array. I recall intending to do that when I first wrote this, but clearly it never happened.