Ubuntu vs Mac OS X

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

**********************
"The contents of this message do not reflect any position of the U.S.  
Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division	
Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097

e-mail: Roy.Mendelssohn at noaa.gov (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/

"Old age and treachery will overcome youth and skill."