In PlexAmp on Debian, all animations play slowly. Smaller animated elements are less noticeable (e.g. in the settings the left/right slide animation when going into or out of a settings pane) but the visualizers are completely unusable. Spectrum plays at probably around 5-10 FPS, but any of the more complex visualizers basically crash the application (it still runs and will eventually respond but it’s so slow it’s basically unusable).
PlexAmp v. 3.1.1