Well I don't know. I've been profiling Yappari lately and have fixed some very tiny memory leaks (8 bytes... 4 bytes... things like that). I can't think of anything right now that could make Yappari degrade its performance over time.

Also whoever asked if Yappari is gonna be OpenSource, I think very soon I will upload it to the repositories (and then you can go like this: apt-get source yappari).

Maybe in the first quarter of 2013. I need a stable client first and I don't have it yet.