Hello, my test was meant to be a rough comparison of speed. If you try maple 11 on mac OSX it is even worse, I installed maple 11 + mac osX on a pentium double core at 2.13 Ghz. Maple was running about 3 times slower than the same maple 11 on a windows xp. Eniac was a dinosaure and even an interpreter today should run a million times faster and it is not : the speed is comparable. I used to run scripts on a mac with hypercard 10 years ago. It could compute at 16 digits. I bet that my old mac with hypercard could run at the same speed, this is bad, really bad. My machine now runs 129 times faster and the speed of the maple interpreter is about the same as a <color mac for the home and the family> of 10 years ago that runs a hypercard stack, a toy application.... houston we have a problem! We are comparing orders of magnitude, there should be a considerable difference and there is not. Simon Plouffe