Framerate is taken while running in a circle just in front of the heart shaped pond where Wabbin and Perda is located.
Locked at 20 meaning it won't go above 20 unless it hits 30, just as on the Wii U. And unlocked being able to go to any framerate.
While doing these tests I noticed a couple strange things, loading times seemed higher.
Secondly, Whabbin and Pedra randomly disappeared from view.
With 1.7.5, having threaded optimization on unlocks the framerate, but it also increases the loading times and makes NPCs bug out. Might cause a few other things I did not notice as well. It performs almost as good as when disableGPUFence is set to true, except that it quite often drops down to 20 or below. Especially at the start of a battle or when moving into a new area.
1.8.0b on the other hand seems to ignore what threaded optimization is set at, and keeps it at off, which means it will lock the framerate to 20. So its not that it performs worse, its that it locks the framerate just like the Wii U does.