Shopify/batman — pull request #728 by ibawt (2013-05-22 14:12:06+00:00)
Title: unrecursed parseNode

This makes the heat graph look a lot more sane.
I didn't see much of an improvement, but realistically if we're doing it breadth-first there's no reason to blow the stack up.

@matthelm you were asking for this I think.