[petsc-dev] VecAXPY() in loops in TS

Barry Smith bsmith at mcs.anl.gov
Fri Feb 18 20:11:20 CST 2011

  Added to projects.html list


On Feb 18, 2011, at 5:34 PM, Jed Brown wrote:

> On Sat, Feb 19, 2011 at 00:24, Barry Smith <bsmith at mcs.anl.gov> wrote:
>  Even adjusting the array passed in will be worth it.
> Yes, the work to futz around with the small array is tiny compared to the cost of streaming the vector through extra times.
>  Should MAXPY have an optional constant scale factor, does it come up enough?
> It looks like about half of the uses in PETSc are preceded by a loop to apply some constant factor, so I think such a parameter would be worthwhile.

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