I have two computers at work. The first is a Dell Optiplex. It has a 3.0 GHz Pentium 4 with a 1.5 GB of RAM. I've never had a computer clocked at 3 GHz before. That was near the pinnacle of the NetBurst architecture.
The second computer is an IBM ThinkPad T43p. It has a 2.1 GHz Pentium-M with 2 GB of RAM. Again this was near the pinnacle of the single core Pentium-M's. It has some other nice features, maybe I'll blog about it so more later.
Right now, all three computers in question are running Windows XP. I ran Firefox 2.0.03, IE 7, and Opera 9.10. Here are the results:
Interesting results! From the browsers, Opera was always faster than Firefox and Firefox was always faster than IE. No surprises here. I was most surprised to see how well the Pentium-M performed. I thought the AMD would beat it out, but it did not. The biggest difference between the two was on the last test. This test calculates the day of the week for Christmas day for the next 1000 years. This test accounted for almost all of the Pentium-M's advantage on each system. I'd be interested to see the JS code for this, but one would think that it would come down to a lot of integer math. So it would make sense that the Pentium-M would have an advantage here. Actually, you gotta wonder why the P4 didn't do better on this test.