R devel - Apr 2000 - options(keep.source = TRUE) -- also for "library(.)" ?

> Subject: Re: [Rd] options(keep.source = TRUE) -- also for
"library(.)" ?
> From: Peter Dalgaard BSA <p.dalgaard@biostat.ku.dk>
> Date: 27 Apr 2000 14:37:01 +0200
> 
> Martin Maechler <maechler@stat.math.ethz.ch> writes:
> 
> > Can we [those of us who know how sys.source() works...]
> > think of changing this?  As it was possible for the base package, it
must
> > be doable for the others as well....
> 
> Martin, surely you could have figured out to remove these two lines
> from sys.source:
> 
>     oop <- options(keep.source = FALSE)
>     on.exit(options(oop))
> 
> The real question is whether we want to have a different mechanism for
> controlling whether keep.source is set or not. Originally it was FALSE
> for the base library to save space, and according the same setting was
> used for other libraries since some of them are rather large, but
> later it got flipped to TRUE for base, and then there is little point
> in setting it FALSE for packages. Question is whether anyone would
> want the old behaviour back to get more space for analyses?
Yes, but really I would rather have packages stored in separate
workspaces that the garabage collector avoided. Then space is less of
an issue.  Ross I know suggested that, but I don't think anyone
is working on it.

My guess would be that we will not have any space/gc improvements
ready for 1.1, unless Luke's things are close. (BTW, Luke, is your
changed code available?  I went to think about doing some timings the
other night and realized that I thought not. A cvs branch might be good(ish)
way to let us play with it.)

Brian

-- 
Brian D. Ripley,                  ripley@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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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gcinfo reports the amount of remaining heap using
	vcells = R_VSize - (R_VTop - R_VHeap);

but R_alloc tests
        if (R_VMax - R_VTop < size)
		mem_err_heap(size);


This means that you can get an out of memory error when gcinfo insists
there are vast amounts of memory left.


	-thomas

Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle

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