[R] Ubuntu vs Mac OS X

[Roy Mendelssohn]

On Apr 25, 2008, at 4:34 PM, Guillaume Blanchet wrote:

> Hi !
>
> I have installed R-2.7.0 64-bits on a computer where the new Ubuntu
> version (8.04) was installed. This computer is a 3.2 GHz Dual-core  
> with
> 2 Gb of RAM.
>
> To test how fast (I though !) this machine is, I compared two simple
> matrix manipulations between Ubuntu and my laptop (a MacBook Pro  
> 2.2 GHz
> with also 2 Gb of RAM under Mac OS X 10.5.2). By the way, I install  
> the
> normal version of R on my MacBook Pro (32-bits)
>
>

A guess to get that big a difference is that one has an optimized  
BLAS and the other doesn't.  Try something not so heavily dependent  
on  BLAS and see what the times are.

-Roy M

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"The contents of this message do not reflect any position of the U.S.  
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Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division	
Southwest Fisheries Science Center
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Pacific Grove, CA 93950-2097

e-mail: Roy.Mendelssohn at noaa.gov (Note new e-mail address)
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