> There is no doubting Casey's chops when he talks about performance, Remember that everyone has their blind spots! I follow Casey on twitter, and a couple ye

> There is no doubting Casey's chops when he talks about performance, Remember that everyone has their blind spots! I follow Casey on twitter, and a couple years ago there was a weird thread where he had hung his browser for 4-5 seconds by running some JS to assign CSS rules to ~50K div elements. And Casey was a million percent confident that the hang was due to JS being slow, and had nothing to do with CSS or DOM rendering.