Yeah zlib is just crazy good at uncompressing. I have VTune'd and tweaked the uncompress path in Zippy and there are no obvious ways to drastically speed it up left. I think zlib has some cleverness at the algorithmic level I'll need to learn about. It'll take some work to match it.
Compressing though, Zippy is better in many cases and not much worse in others so I feel good about that side
