Hi, I have R version 2.0.1 on my PowerBook G4 1.5Ghz, 512RAM, running OS X 10.3.9. I have noticed that the "official" R GUI runs considerably slower than R in the terminal and also JGR. Whilst the differences in speed are unimportant for simple parametric stats, it becomes a bit of a pig when doing non-parametric stats e.g. neural nets, feature selection algorithms. In all my experiments I have set my CPU speed to "maximum" in system preferences. I have also looked at the CPU usage for each implementation: on average R in the terminal and JGR manage to get 98% of CPU usage, compared to only around 75% for the R GUI. I guess my questions are: 1) Why the difference in speed when its on the same machine? 2) Is there any way of tweaking R GUI to make it run faster, a la R in the terminal? Any help would be appreciated. Best regards, Sam. [[alternative text/enriched version deleted]]