Robert McFadden writes:
Dear R Users,
I hope that there is someone who has an experience
with a problem that I
describe below and will help me.
I must buy new desktop computer and I'm wondering
which processor to choose
if my only aim is to speed up R. I would like to
reduce a simulation time -
PROTECTED] On Behalf Of Robert McFadden
Sent: Tuesday, June 19, 2007 4:51 PM
To: r-help@stat.math.ethz.ch
Subject: [R] Speed up R
Dear R Users,
I hope that there is someone who has an experience with a
problem that I
describe below and will help me.
I must buy new desktop computer and I'm
Original Message
Subject: Re:[R] Speed up R
From: Matthew Keller [EMAIL PROTECTED]
To: Robert McFadden [EMAIL PROTECTED]
Date: 19.06.2007 23:09
but I think that windows has problems addressing
that much RAM (surely the 64bit Vista is OK with it though... surely).
Linux
-Original Message-
From: Prof Brian Ripley [mailto:[EMAIL PROTECTED]
The advantage of dual processors is that you can use the
machine for several things at once, including multiple R
jobs. For example, when I am doing package checking I am
typically checking 4 packages at once
Prof Brian Ripley [EMAIL PROTECTED] wrote:
The advantage of dual processors is that you can use the machine for
several things at once, including multiple R jobs.
I've used dual-processor machines for about 10 years now and
emphatically second the point made by Brian Ripley. Even if you
are
On Wed, 20 Jun 2007, Robert McFadden wrote:
-Original Message-
From: Prof Brian Ripley [mailto:[EMAIL PROTECTED]
The advantage of dual processors is that you can use the
machine for several things at once, including multiple R
jobs. For example, when I am doing package checking I
Robert,
I'm not exactly an expert, but here's what I think. If you have only
786 MB of RAM on your machine and you are using ~500 of it in a
session of R, that could slow things down considerably because your
machine is trying to find free blocks of memory that haven't been used
yet. I would buy
FWIW, I have a dual processor G5 Mac (not dual core... 2 separate, 2GHz
processors-- not even made anymore, so you might find a deal if trying to
save $$. If not, go for the octo-core Mac Pro--- 2 quad cores in one very
expensive box).
On my system I have found that with 5G RAM installed, I can
Matthew Keller [EMAIL PROTECTED] wrote:
Robert,
...
As for Mike Prager's point about the type of hard drive being
important, I'm not sure this is right (someone correct me if I'm
misunderstanding). R stores and accesses objects through RAM - they
aren't stored and accessed on the hard drive
So Mike, let me ask you a question. If R runs out of RAM, does it
begin to use virtual RAM, and hence begin to swap from the hard drive?
If so, I could see how a faster hard drive would speed R up when you
don't have enough RAM...
On 6/20/07, Mike Prager [EMAIL PROTECTED] wrote:
Matthew Keller
Matthew Keller wrote:
So Mike, let me ask you a question. If R runs out of RAM, does it
begin to use virtual RAM, and hence begin to swap from the hard drive?
If so, I could see how a faster hard drive would speed R up when you
don't have enough RAM...
Yes. Virtual memory management is done
Dear R Users,
I hope that there is someone who has an experience with a problem that I
describe below and will help me.
I must buy new desktop computer and I'm wondering which processor to choose
if my only aim is to speed up R. I would like to reduce a simulation time -
sometimes it takes days.
Hi Robert,
Here's my 2 cents.
64-bit is a memory issue, not a speed issue per se. If a concern is
increasing RAM (which is important in R since objects are stored in
RAM), then you will want to get 64 bit if you plan on getting a
computer with over 4GB RAM. I'm not sure about this (someone
On Tue, 19 Jun 2007, Robert McFadden wrote:
Dear R Users,
I hope that there is someone who has an experience with a problem that I
describe below and will help me.
I must buy new desktop computer and I'm wondering which processor to choose
if my only aim is to speed up R. I would like to
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