[R] slow graphics download

Prof Brian Ripley ripley at stats.ox.ac.uk
Mon Oct 20 19:34:12 CEST 2008

I suspect that you need to set the type= in X11(): see its help page.

      'type = "nbcairo"' is the same device as 'type="cairo"' without
      buffering: which is faster will depend on the X11 connection.
      Both will be slower than 'type = "Xlib"', especially on a slow X11
      connection as all the rendering is done on the machine running R
      rather than in the X server.

Basically, R's X11 device is now by default optimized for quality rather 
than speed, and your unusual usage needs the reverse.

On Mon, 20 Oct 2008, Paul Murtaugh wrote:

> Hi,
> I often work from home, running R on my office computer and displaying 
> interactive graphics on my home computer using X11.  This was always more 
> sluggish than sitting at my office computer, obviously, but recently the 
> graphics transfer has become painfully slow -- so slow, that I now divert the 
> images to a postscript file and display that file remotely (which takes a 
> second or two).
> I don't know what changed between the old days and now -- I may have 
> installed a new version of R and updated the o.s. (ubuntu) on both computers, 
> but am unsure of the timing.  I realize this makes troubleshooting difficult, 
> but I am hoping someone can offer a tip on where to begin.
> Thanks
> -Paul
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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

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