[R] Hardwarefor R cpu 64 vs 32, dual vs quad
Dr Eberhard Lisse
el at lisse.NA
Wed Sep 10 11:27:56 CEST 2008
I'd buy a Mac Power server.
Not that's much faster, but while one of the cores toils away
at R you can play games on the others :-)-O
on 9/9/08 8:54 PM Henrik Bengtsson said the following:
> On Tue, Sep 9, 2008 at 6:31 AM, Nic Larson <niklar at gmail.com> wrote:
>> Need to buy fast computer for running R on. Today we use 2,8 MHz intel D cpu
>> and the calculations takes around 15 days. Is it possible to get the same
>> calculations down to minutes/hours by only changing the hardware?
>> Should I go for an really fast dual 32 bit cpu and run R over linux or xp or
>> go for an quad core / 64 bit cpu?
>> Is it effective to run R on 64 bit (and problem free
>> Have around 2000-3000 euro to spend
> Faster machines won't do that much. Without knowing what methods and
> algorithms you are running, I bet you a beer that it can be made twice
> as fast by just optimizing the code. My claim applies recursively.
> In other words, by optimizing the algorithms/code you can speed up
> things quite a bit. From experience, it is not unlikely to find
> bottlenecks in generic algorithms that can be made 10-100 times
> faster. Here is *one* example illustrating that even when you think
> the code is "fully optimized" you can still squeeze out more:
> So, start profiling your code to narrow down the parts that takes most
> of the CPU time. help(Rprof) is a start. There is also a Section
> 'Profiling R code for speed' in 'Writing R Extensions'. Good old
> verbose print out of system.time() also helps.
> My $.02 ...or 2000-3000USD if it was bounty?! ;)
>> Thanx for any tip
>> [[alternative HTML version deleted]]
>> R-help at r-project.org mailing list
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Dr. Eberhard W. Lisse \ / Obstetrician & Gynaecologist (Saar)
el at lisse.NA el108-ARIN / * | Telephone: +264 81 124 6733 (cell)
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Bachbrecht, Namibia ;____/ if it is DNS related in ANY way
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