Cache the event props

[flesler]

Hi Brandon, I haven't benchmarked this, but there's no doubt that creating such a long string, and then splitting it requires quick a while.

So I propose caching it. I randomally use $.event.props.

By the way.. what's the reason you're copying stuff like srcElement, toElement, prevValue, etc ?

Why copy non standard attributes ?

[brandon]

you ended up fixing this yourself. :)