[R] question about performance on different operating systems

Matthew Norton matthew.norton at UMontreal.CA
Wed Dec 12 20:51:13 CET 2001

I have  a quick question for the gang.

I'm running a batch of simulations on a number of different computers, and 
have noticed that certain systems seem to run much more slowly than others. A 
rough calculation leads me to think that R for the Macintosh is running at 
_least_ 10 times more slowly than under linux.

To give you an idea, to run a small number of simulations takes around 80 
seconds on my laptop (running Debian linux, 200MHz processor, 112 megs RAM) 
while the same batch takes upwards of 10 minutes on a powermacintosh G4 
(350MHz and 128 megs of RAM).

Out of curiosity, is this unexpected, or can that sort of performance hit be 
normal when changing operating systems.

Matthew Norton
Dept. Biological Sciences
Universite de Montreal

p.s. I'll run the same check on my windows desktop at home, and let you all 
know its speed.
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