This is mainly a Mac only issue. I discovered that I was getting about 1/8th the amount of battery time recently. I thought it was a Yosemite issue, so I got some stuff to watch what was eating all my resources and causing my computer to overheat on what I would consider normal use.

Chrome was the culprit. Switched to Firefox and the issue is gone. However, I have recently gone back to Chrome when plugged in because FF has been crashing a lot and seems sluggish.