@XLR8__ Just guessing here, but I would expect it to be because when you are limiting the game to lower fps you are actively forcing the main thread of the game to sleep. They are most likely dispatching new shaders to compile per frame, so this adds time to shader compilation.
@yiningkarlli Happy to see people use my widget.
There is currently even more stuff on the way, including editing, multiselect and keyframe deletion API.
Also support for animation curves is planned in future.