Well I'm quite sure your CPU will not be maxed out by this site's scripting. I'd look at what's resident in memory and find out your systems 'usual' resource limits. That much will be able to tell you how many applications, services and other things you may run without having such problems.

It could also be the sign of a virus, spyware or some kind of worm. But in short keep your system in proper order by organizing, securing and not over abusing it(playing with systems files, etc).

"Thats right, the new PGD site is 3 laws safe!" -Me spoofing off of 'I, Robot'