Re: [R] speed?

From: Kerpel, John <John.Kerpel_at_infores.com>
Date: Sat 03 Jun 2006 - 02:46:58 EST


The benchmark report is good stuff - I've been wondering about these speed issues recently myself.

Has anyone tried something similar on 64-bit Linux or other OS? I'm contemplating switching to 64-bit Linux if I'll get some dramatic cycle time improvements. Anyone have any experience with this?

Best,

John

-----Original Message-----
From: r-help-bounces@stat.math.ethz.ch
[mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Liaw, Andy Sent: Friday, June 02, 2006 10:01 AM
To: ivo welch; r-help@stat.math.ethz.ch
Subject: Re: [R] speed?

You (and your colleague) might want to have a look at http://www.sciviews.org/benchmark/. It's a bit dated, but still may be a good starting point.

Some months ago some one asked about working on getting R to use the GPU for computation on the R-devel list. Don't know if anything came of it.

Cheers,
Andy

From: ivo welch
>
> dear R wizards:
>
> while extolling the virtues of R, one of my young
> econometrics colleagues told me that he still wants to run ox
> because [a] his code is written in it (good reason); [b]
> because ox seems to be faster than R in most benchmarks (huh?).
>
> this got me to wonder. language speed can't matter much, so
> it must be mostly the underlying matrix algebra by now. I
> presume that nowadays most of the plain matrix operation
> speed depends primarily on which hardware features the
> library accesses. (The basic algorithms aren't so different,
> so even though the algorithm may have mattered a long time
> ago, they are probably pretty similar nowadays. hmmm...maybe
> matrix inversion still is different, but multiplication and
> adding should not be.)
>
> On x86 architecture, I believe there is a hierarchy in terms
> of raw processing power: FPU < SSE* < GPU.
>
> is it even possible to use the GPU now for math processing
> (linux or windows), and specifically in R?
>
> assuming I compile everything with the proper SSE flags and atlas, is
> SSE* fully taken advantage of?
>
> regards,
>
> /ivo
>
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