It spins the fans on my i5 2011 air like there's no tomorrow, kinda like if I open a badly programed flash file. No crash though. And the whole thing is kinda slow when you scroll.
Chrome.exe used 6% CPU while scrolling and 3% while not scrolling. This was on a 16 core machine! One of my cores hovered around 75% while scrolling and around 35% while not scrolling, which went down to zero when I closed Chrome.
No problems here but I'm on a beefy machine: FF11, 64 bit Win7, quad core i5, 8GB ram, SSD drive - frankly I'd cry if a website was able to slow/crash that.
I use chrome on an 64 bit Win7, i7 2600K with 16GB ram and a 35/35 FIOS connection and plenty of flash sites slow things down to a crawl. Honestly, I cant help but wonder what exactly some developers expect people to use.
I don't think it's a question of what they expect. More like they have no idea how to program and Flash has let them get away with it. Seriously, there is no other sane reason why you should experience slow downs on a machine with that spec (assuming Flash can even harness most of that power).