Just want to respond to this in case nobody else has.
Vsync stops screen tearing, that's literally what it exists to do. Without vsync (or gsync or freesync) ALL GAMES will have tearing. This is because the gpu is rendering and delivering frames as fast as it can with no regard for how much of the previous frame has displayed, so when you move the camera you get part of one frame and part of another ect.
Has nothing at all to do with optimization.