Odd way to make the game run better

I need a confirmation on this. but i’m sure i’ve found a way to make the game run better.

I do this buy pressing the arrow keys to switch rooms for the last area, rather than dragging my mouse to do so.
Maybe because this gives the perfect space for that section without revealing any of the other parts?

I’m unsure, but when i move with those I seem to get much better performance.
Could use someone else to test this though.