Message-ID: <43A16C29.7010001@jhsph.edu>
Date: 2005-12-15T13:14:17Z
From: Roger D. Peng
Subject: 32 vs 64 bit
In-Reply-To: <43A09CD4.3020803@bank-banque-canada.ca>
When we first moved to 64 bit I found that certain things were slower. I
believe it is because of the increased overhead for memory management.
-roger
Paul Gilbert wrote:
> I ran R on an AMD Athlon 64 with a 32 bit Linux (by accident, I moved
> the hard disk from another machine). Now, after install 64 bit Linux and
> 64 bit R, I am finding some of my R tests are quite a bit slower, I
> think because memory demands cause a lot of swap. Does anyone know if
> extra memory usage would be mainly because of R itself, or is there a
> lot of extra memory demand because of the OS, windowing system, and
> other apps?
>
> Paul Gilbert
>
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--
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/