Re: [Help-gsl] why disable range checking ? Re: Help-gsl Digest, Vol 81, Issue 10

[Alejandro Cámara Iglesias]

I can think of one: speed.

The range checking probably is two if statements. If your code manage the
range checking (or you are completely sure that no over/underflow may occur)
you can disable it to make it faster when you have to access many elements.

Maybe Glide Creme can point out more reasons.

*Alejandro Cámara*
PhD Student at the GICO <http://www.ucm.es/info/giboucm/>



2010/7/26 Awhan Patnaik <address@hidden>

> > Message: 2
> > Date: Thu, 22 Jul 2010 01:37:55 +0200
> > From: glide creme <address@hidden>
> > Subject: [Help-gsl] range check ?
> > To: address@hidden
> > Hi I'm having trouble disabling the range checking in the gsl.
> > I guess I'm abit rusty in the cpreprocessor macro world, so if someone
> > can elaborate on issue.
> >
> > gcc -lgsl gsl.c -lgslcblas -DHAVE_INLINE -DGSL_RANGE_CHECK=0
> >
> > I still get the
> > gsl: ../gsl/gsl_vector_double.h:177: ERROR: index out of range
> >
> > To: glide creme <address@hidden>
> > Cc: address@hidden
> > Hello Glide,
> >
> > I don't have GCC right now but you might want to try using
> >
> > -UGSL_RANGE_CHECK
> >
> > instead of
> >
> > -DGSL_RANGE_CHECK=0
> >
> > Best,
> >
> > Javier
> >
>
> forgive this offtopic but related question. why would anybody want to
> disable range checking? i think its a recipe for disaster ... i m
> surprised to even find such a facility in gsl.
>
> _______________________________________________
> Help-gsl mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-gsl
>