How odd! I never encountered such problems during development, nor has any of my friends playtesting it. Not even my profiler flaired up when I’ve been moving for a while. If anything, physics calculations take up more CPU time than AudioStreamPlayers. What device are you using? Which browser? I’d be willing to get to the bottom of this if you have the time, since I can’t reproduce your problem myself. I’d at least be learning something about godot!