[R] Speed up R

[bogdan romocea]

Don't rush to buy new hardware yet (other than perhaps more RAM for
your existing desktop). First of all you should make sure that your R
code can't be made any faster. (I've seen cases where careful
re-writes increased speed by a factor of 10 or more.) There are some
rules (such as pre-allocate enough memory for vectors/lists, use
matrices instead of data frames etc) and tools (?Rprof, ?Sys.time)
that can help a lot. Check the manuals and the archives, for example
http://article.gmane.org/gmane.comp.lang.r.general/48800


> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Robert McFadden
> Sent: Tuesday, June 19, 2007 4:51 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Speed up R
>
> Dear R Users,
> I hope that there is someone who has an experience with a
> problem that I
> describe below and will help me.
> I must buy new desktop computer and I'm wondering which
> processor to choose
> if my only aim is to speed up R. I would like to reduce a
> simulation time -
> sometimes it takes days. I consider buying one of them (I'm
> working under
> Win XP 32 bit):
> 1. Intel Core2 Duo E6700 2.67 GHz
> 2. Dual-Core Intel Xeon processor 3070 - 2,66 GHz
> 3. AMD Athlon 64 X2 6000+
> Or simple Pentium 4?
>
> I'm very confused because I'm not sure whether R takes
> advantage dual-core
> or not. If not, probably Athlon would be better, wouldn't be?
> I would appreciate any help.
> Rob
>
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