The latest Google Doodle seems to be yet another CPU draining animation. Yes it's clever... and I believe it showcases HTML5 but 40 to 60% CPU useage (AMD Turion64) just to have the Google home page as an open tab.
Do a Google search for "Google doodles high cpu" and you'll get the picture.
I defected to Bing a couple of weeks ago and tbh find I am preferring it. Seriously considering binning Google altogether.