[vtkusers] performance issue

[David Gobbi]

On Wed, Feb 23, 2011 at 6:21 PM, vlibertiaux <vlibertiaux at gmail.com> wrote:
>
> Sorry David, I didn't answer your question:
>
> the time needed to clip the volume dropped from 18s to 0,3s.

I thought that it would be a good number.  For an n x n x n image,
creating a stencil from an implicit function is O(n^3) while creating
a stencil from polydata is only O(n^2).  So for large images, the
polydata approach is always the way to go.

 - David