So I've released my app, Zombieville USA, on the app store and its doing fairly well so far and getting good reviews, but there's this periodic framerate hitch that I've been trying to track down ever since submission. The Problem: Basically every few minutes or so, the game will stall briefly (sometimes the stall will last for a fraction of a second, sometimes for a full second or two). Both the visuals and the sound will freeze during this time (especially noticable if there's a sound