[R] Opening more than 1 R console in Windows

[Prof Brian Ripley]

On Mon, 19 May 2008, Charles Plessy wrote:

> Le Mon, May 19, 2008 at 07:39:11AM +0100, Prof Brian Ripley a écrit :
>> On Sun, 18 May 2008, Anh Tran wrote:
>>>
>>> I recently found out that R does not utilize fully the Duo Core capability
>>> when you only run one instance of R.
>>
>> How surprising was that?  Do you have any programs that do?  Very few
>> Windows programs make effective use of multiple CPUs, and of those that
>> do, they do not do so for the sort of tasks R is running routinely.
>
> Hello,
>
> actually, when I was (wrongly) plotting a 1,500,000 × 8 data frame and
> had problems because the plot window was redrawn very frequently, I
> wondered whether this would be one task that could be given to a separate
> CPU than the one that deals with the command line interface of R. Do you
> think that it would be possible?

Not at present.  There are other reasons to want to do graphics 
interaction in a separate thread, but there are complex synchronization 
issues.  (Suppose you start plotting on a device that is currently 
repainting?)  We are moving in that direction, slowly.

>
> Best regards,
>
> -- 
> Charles Plessy
> Wakō, Saitama, Japan
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595