[R] No performance increase from dual-core processors?

From: Adam Petrie <petria_at_rpi.edu>
Date: Tue 27 Dec 2005 - 11:21:17 EST

Hey all,

I was planning on getting a new computer for the new year to help with my dissertation research, and recently had an opportunity to compare the performance of my 1.6 GHz Pentium M laptop, and a 2.8 GHz dual-core Pentium processor (both running WinXP professional 32-bit). I run a lot of long simulations, so I was hoping to get something that would speed them up. I ran a few quick computation tests (e.g. generating 500,000 normals), and found the performance increase of the 2.8 dual-core over my 1.6M laptop to be negligable (and in fact sometimes slower). One thing I did notice that if I look at the CPU usage of my laptop when it's performing the simulations the laptop is at about 100%, while the dual-core reaches 50% (and seems to refuse to go higher than 50% no matter what). Of course if I load up 2 instances of R I can get them to run the simulations simultaneously in about the same amount of time, but this doesn't help me get to the end of a very long simulation quicker. This got me thinking that no matter what kind of processor I get, I'm not going to be getting a large speed increase over what I already have. Does anyone have any insight into various setups/processors that would help me speed up my work (e.g. maybe run R through linux, Pentium extreme edition, etc)?

Thanks in advance,

Adam Petrie
Rensselaer Polytechnic Institute

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Dec 27 11:29:10 2005

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