[Rd] RE: [R] ^ operation much slower in R 1.7.1 than in R 1.7.0 ???

Prof Brian D Ripley ripley at stats.ox.ac.uk
Tue Aug 5 10:02:42 MEST 2003

On Tue, 5 Aug 2003, Philippe Grosjean wrote:

> I propose to move this thread to R-devel...
> Prof. Brian Ripley wrote:
> >And are you able to give an explanation?  For example, did you compile
> >each under the same compiler system?
> I just noticed that behaviour yesterday, and had not much time yet to
> investigate it. I compiled 1.7.0 myself (but compared with the binary
> provided on CRAN; no changes). I used the 1.7.1 binary provided on CRAN. I
> know these binaries are not supported, so we (Windows users) will have to
> look at that by ourselve. Indeed yes, I'll first compile 1.7.1 with the same
> compiler I used for 1.7.0.
> >I doubt if this is worth R-core's time to pursue, so over to interested
> >users to find an explanation and fix.
> OK. But I was wondering if people at R-core team, especially those who
> worked on Windows specific aspects, would have in mind some changes they did
> between 1.7.0 and 1.7.1 than can cause this. Since these changes are mainly
> corrections of bugs, the list is hopefully not so long... and it could help
> a lot to have these hints. Thanks very much.

No idea from me, and the effect is not seen on other platforms.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
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

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