On Tue, 21 Feb 2006, Simon Urbanek wrote: > > On Feb 21, 2006, at 2:48 PM, Bernd Kriegstein wrote: > >> Thank you very much for the answer. As a general principle, when >> and why should I register the counters? > > "register int i" is merely an optimization, you can safely use "int > i" instead. The "register" keyword only tells the compiler to store > the variable in a CPU register where possible - it is not necessary > at all (most modern compiler will optimize it correctly anyway).
I actually think you should leave this off with an optimizing compiler. They are better at optimizing register use than humans! I believe there are only a few dozen `register' statements in the R code base, almost all of which are in code borrowed or generated (e.g. gram.c). -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
