CGAL users discussion list

[Sylvain Pion <>]

Benjamin schwarz wrote:
> Well... I can't explain why, but I just changed the order of my
> includes... "et voilà" (What is the english for "c'est tombé en
> marche" ?), now it runs a lot faster and in accordance with the
> expected times.
>
> Still, is it possible to choose the subdivision scheme ?
>
> I don't know if the dependance on includes order is a normal behavior,
> if not, here is a hint to solve the problem :
>
> My actual includes
> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
> #include <CGAL/Skin_surface_3.h>
> #include <CGAL/Polyhedron_incremental_builder_3.h>
> #include <CGAL/Polyhedron_3.h>
> #include <CGAL/mesh_skin_surface_3.h>
> #include <CGAL/subdivide_skin_surface_mesh_3.h>
>
> #include <CGAL/IO/Geomview_stream.h>
> #include <CGAL/IO/Polyhedron_geomview_ostream.h>
> #include <CGAL/Timer.h>
> #include <list>
> #include <iostream>
> #include <fstream>
>
>
>
> my former includes :
> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
> #include <CGAL/Polyhedron_incremental_builder_3.h>
> #include <CGAL/Polyhedron_3.h>
> #include <CGAL/IO/Geomview_stream.h>
> #include <CGAL/IO/Polyhedron_geomview_ostream.h>
> #include "skin_surface_writer.h"
> #include <CGAL/Skin_surface_3.h>
> #include <CGAL/Polyhedron_3.h>
> #include <CGAL/mesh_skin_surface_3.h>
> #include <CGAL/subdivide_skin_surface_mesh_3.h>
> #include <CGAL/Timer.h>
> #include <list>
> #include <iostream>
> #include <fstream>

This one is probably for Nico.

> > -DNDEBUG is important for performances.
> I already had a bad experience with that a long time ago ;)

Note that NDEBUG is not supposed to dramatically improve performance.
The difference is supposed to be around 20% maximum, and at the maximum
one order of magnitude.  If you notice more than that, please report it.
CGAL has several categories of assertions, and the costly ones should
not be activated by default (CGAL_CHECK_EXPENSIVE enables those).
So there might be some errors in the categorization.

--
Sylvain Pion
INRIA Sophia-Antipolis
Geometrica Project-Team
CGAL, http://cgal.org/

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