I've been playing around with optimizing GPSDrive for my own purposes. I've rebuilt gpsdrive, gpsd, and libpcre3 in scratchbox, with some optimization flags, plus I configured out some optional parts that I didn't need. The results are not bad.

There's more to come, as I start to gut gpsdrive of all of the excess features that I don't want/need (like friendsd2 support) and add features that I do want, which are listed in the above page.

Suggestions are certainly welcome!