That's wierd - I show a cpu usage of about 48-52% on one of my four threads (2 cores) when I have the tab open, and under 5% on all with the tab closed.
This is on Firefox, Linux.
A side note: I started involuntarily humming the star wars theme to myself as the text started to scroll... I dare say: George Lucas has hacked my brain!
Intel i7 (4 cores w/ hyperthreading) running Ubuntu and Chrome 22 and that at one point was >60% on 3+ threads. On the bright side, it's great that Chrome is able to so seamlessly multithread complex CSS operations. That said, this is a rather fast CPU and I would have expected it to perform better.
This is on Firefox, Linux.
A side note: I started involuntarily humming the star wars theme to myself as the text started to scroll... I dare say: George Lucas has hacked my brain!