CGAL users discussion list

[Michael Hemmer <>]

Sebastien Loriot (GeometryFactory) wrote:
> Ariel Keselman wrote:
> > Dear all,
> >
> > after every Ubuntu update, I have this problem in which the
> > both the compilation time AND running time of my program
> > decrease by a factor of 2.
> >
> > For compilation I use 'scons', and I link with the following
> > libraries:
> >
> > CGAL_Core, CGAL, gmp, gmpxx, mpfr, boost_thread-mt
> >
> > and with the following flags:
> >
> > -O3
> >
> > This issue appears to be solved after several minutes,
> > but I would be happy to know if there is a reason, and
> > a way to guarantee consistent behavior.
> From what you describe I see no reason why CGAL would be responsible
> for that. Maybe a process was running in background and was slowing down
> your system (which would explain why things were normal several 
> minutes later).
>
> S. 
But in any case it makes sense to also use: -DNDEBUG or at least 
-DCGAL_DNDEBUG,
since you only mention -O3.

Michael