Although it doesn’t get too much of a spotlight anymore, Opera always has done (and is still doing) a lot of things first, and well. With all of us going off the wall with CSS3, actual render time is becoming a big(ger) concern with each passing day. Opera Dragonfly is aiming to help us out with style profiling:
How sweet is that?! Admittedly I haven’t checked out Dragonfly in some time, but it looks like a lot of work is going into it both under the hood and on the face of things with the UI. I’ll be keeping my eye on this for sure, and I can imagine we’ll be seeing it in our browser dev tools of choice any release now.