Whenever I start Safari 8.0 (on Yosemite 10.10) after resuming my Mac from sleep, it kicks off a web process which consumes 100% CPU and soon gets the fans on my MBA going:
What's strange is that it's always the same URL (http://www.saudecuf.pt/) which is a site I haven't visited for a very long time, certainly not since I upgraded to 10.10. I have no idea why it's picking up that URL. The only solution is to force quit that process and from then on Safari behaves normally until the next time I put my Mac to sleep.
BTW: the site is the site of a local private hospital, nothing special.