From ligges at statistik.uni-dortmund.de  Fri Jan 28 09:18:26 2005
From: ligges at statistik.uni-dortmund.de (Uwe Ligges)
Date: Fri Jan 28 09:17:24 2005
Subject: [Rd] the incredible lightness of crossprod
In-Reply-To: <41F96807.1000405@pburns.seanet.com>
References: <41F907EA.90406@pburns.seanet.com> <41F9382E.2060200@stat.wisc.edu>
	<41F96807.1000405@pburns.seanet.com>
Message-ID: <41F9F552.7090501@statistik.uni-dortmund.de>

Patrick Burns wrote:

> On my machine the versions are all precompiled R, and I would
> be very surprised if the same were not the case on the client's
> machine.  That is, no specially compiled BLAS.

Hmmm. I always install using some advanced BLAS: On Windows, e.g., 
simply using the Rblas.dll provided by Brian Ripley, on Linux it's 
really no effort to compile it yourself.

For huge matrices you can use your some-years-old-desktop machine (with 
some advanced BLAS) to outperform expensive multi-CPU machines (without 
advanced BLAS).

Uwe Ligges


[Rd] the incredible lightness of crossprod
Uwe Ligges