The Fastest For-In Loops in the Whole Wide Web

Congratulations! Ms. Chevalier-Boisvert, please add the graph "after" your fixes too -- it looks much nicer being able to see both "before" and "after" pictures.

I haven't looked at your code, but have you tried to have more complex JavaScript constructs still implemented in JavaScript, e.g. like it seems Firefox does that here:

http://dxr.mozilla.org/mozilla-central/source/js/src/builtin...