Just thought I'd throw in my tuppence of knowledge.
I'm on a Mini running Tiger so I know its not a direct comparison, but I got a problem last november where the occasional app, including Safari, Mail, Preview and, oddly, Finder, would act as if it were running through treacle, like insanely slow.
So I tried fiddling with settings, and nothing much happened. Then I got bored and started playing with more exotic key commands, and eventually got round to resetting the P-RAM on startup.
Boof, the Mini started behaving like it was running on rocket fuel and the processor was suffering from delusions of grandeur (picture a 3GHz Mini... thats what it thought it was). I was amazed, it was running faster than it ever had beforehand. And it still is, although slightly slower because the hard drive only has 12GB free space left...
So maybe try that?
I'm on a Mini running Tiger so I know its not a direct comparison, but I got a problem last november where the occasional app, including Safari, Mail, Preview and, oddly, Finder, would act as if it were running through treacle, like insanely slow.
So I tried fiddling with settings, and nothing much happened. Then I got bored and started playing with more exotic key commands, and eventually got round to resetting the P-RAM on startup.
Boof, the Mini started behaving like it was running on rocket fuel and the processor was suffering from delusions of grandeur (picture a 3GHz Mini... thats what it thought it was). I was amazed, it was running faster than it ever had beforehand. And it still is, although slightly slower because the hard drive only has 12GB free space left...
So maybe try that?