This is more an old general concern about the screen scoll zoom speed in side the sketch engine.
it still can slow down to a degree that I have to quit the app and restart it and that is seriously not something
you want a user to experience.
so please kill the effects and focus on speed in the engine - add magical delicious powdered sugar on top!
video: https://drive.google.com/file/d/0Byzv_NlyKp_2UTB6TVhSanFnQ1k/view