Test "isVisible() rendering bypass" Performance

[rsandor]

As I was cutting jQuery out of the library (#62) I came across an interesting article on StackOverflow that lead me to this jsperf showing that depending on how you check visibility there can be some serious performance consequences.

Let's build a test on http://jsperf.com/ to see just how much performance you gain having to check for visibility each frame. Specifically we should test the following:

1. Visible container rendering with check
2. Visible container rendering without check
3. Invisible container rendering with check

[ghost]

Apparently GitHub requires a certain style for closing multiple issues at once. Whoops!

[rsandor]

Oh weird, I didn't know that wouldn't work. Good catch!