Message-ID: <loom.20090422T064729-505@post.gmane.org>
Date: 2009-04-22T06:50:28Z
From: Dieter Menne
Subject: My surprising experience in trying out REvolution's R
Jason Liao <JLIAO <at> hes.hmc.psu.edu> writes:
> I care a lot about R's speed. So I decided to give REvolution's R
> (http://revolution-computing.com/) a try, which bills itself as an
> optimized R. Note that I used the free version.
>
> My machine is a Intel core 2 duo under Windows XP professional. The code
> I run is in the end of this post.
>
> First, the regular R 1.9. It takes 2 minutes and 6 seconds, CPU usage
> 50%
>
> Next, REvolution's R. It takes 2 minutes and 10 seconds, CPU usage 100%.
>
> In other words, REvolution's R consumes double the CPU with slightly
> less speed.
The fact that it is the same time with only the 50%/100% makes me think
this is an artifact of the CPU indicator. Try to assign only one CPU to
the REvolution task. Wild guess: also 2 minutes plus minus
Dieter