Smarter maps optimizations for Ld and SS.

Yeah, this pretty drastically normalizes SS behavior (actually speeds it up a little on the lower children count end) whilst speeding up Ld times. Included are some pretty (poor) graphs, but they should help a little bit. I know it's inconsistent, sorry. I changed the output code.

![Giraffes](https://dl.dropboxusercontent.com/u/8097711/pkgnx-graphs.png)