Selecting an item from an NSPopupButton causes a noticeable hitch in frame rate (I have a metal scene running in a window so it is easy to notice). This happens even if I am not subscribing to the Activated Event. I notice the same kind of delay with NSMenuItems being selected, again even if no action is called. Something blocking the main thread perhaps?
I'm not sure where to look at this point, any suggestions would be very welcome!