We use R a lot for graphics and noticed very slow graphics in Quartz
mode where X11 is much faster.
Our hardware: intel mac pro and intel macbook pro, both are affected.
os versions: OS X Tiger 10.4.8
R version: R version 2.4.1 (2006-12-18)
We tried the following simple thing.
- Open the R program from the dock (not from the command line)
- run the following two lines:
d = matrix(runif(300*2000),300,2000)
image(d)
image(d) #again a second time
and see how long it takes to appear on screen the first time, and
again the second time.
Then close R and open an X11 terminal and start R from the command line.
try the same commands
d = matrix(runif(300*2000),300,2000)
image(d)
image(d) #again a second time
We found huge differences in speed, perhaps we are doing something
wrong?
As a result we exclusively use R in X11 mode which works fine for us.
Felix Naef
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