Here's a bit of clean-up fro the just-landed Activation optimization.
Created attachment 18422 [details] patch
Created attachment 18424 [details] patch (revised with a tiny change to pass all tests)
Comment on attachment 18424 [details] patch (revised with a tiny change to pass all tests) LGTM
Comment on attachment 18424 [details] patch (revised with a tiny change to pass all tests) I think this patch no longer cleanly applies because of the new activation stack. I'll find out when I get some time.
Committed revision 29810.