I am getting consistently low frame rate when the editor is in play mode. I have created a new empty project and scene and the results are the same. The frame rate seems to be about 30-40 fps although unsurprisingly the stats show a rather high frame rate. There doesn't seem to be anything strange in the profiler except some abnormally high physics stuff, especially for an empty scene. But nothing that would cause a framerate of 30: The performance when panning the scene view camera around when not in play mode, or when play mode is paused is fine, but once play mode is started the frame rate is choppy. Operating system is OS X Yosemite public beta 4 (10.10 14A379b).