[R-SIG-Mac] Old Dell running faster than new MacBook

[Nils Rüfenacht]

I recently changed from a 4 year old Dell running on Windows XP to a  
mew MacBook Pro running on OS X 10.5. I expected to save an amount of  
runtime when executing my R code now, but I was mistaken.

I didn't figure out what the problem could be! Same code is running  
about 30% (!) slower now!

Any suggestions?

N.R.