Code review comment for lp:~smspillaz/unity/untiy.less-paint-insanity

Bump?

I'd like to see this go in, because it should reduce lots of list copying within unity and also lots of unecessary list traversal, which should represent a nice speed boost. In addition, its far simpler in its implementation and far less bug prone.

I'm sure testing is probably an issue. I'll have another quick look at the code and see if I can think of a way to get it under test.