something slowed down MatSetValues

[Matthew Knepley]

You have not preallocated the matrix correctly.

  Matt

On Wed, Jun 10, 2009 at 1:10 PM, xiaoyin ji <sapphire.jxy at gmail.com> wrote:

> Hi,
>
> I've just got a problem with MatSetValues. I have a loop of about 1
> million and 6 MatSetValues call inside. The loop runs very slow( about
> several minutes or more), but if I comment one or two MatSetValues
> then it will finish in seconds. Any hints? Thank you!
>
> Xiaoyin Ji
>



-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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