It’s a perception of speed that shapes up your experience from using a Mac. OS X has a lot of subtle animations in order to guide the users. Some animations are too slow. In order to achieve what I call as optimized performance, you need to be able to distinguish the difference between useful and useless animations and adjust it accordingly. 

Sayzlim has two simple OS X hacks that are about perceptive speed, disabling window animations and speeding up mission control’s animations.

Users who are familiar with the iOS jailbreak hacks for speeding up animations will be no stranger to what this entails. These won’t actually make your Mac faster but it will make your Mac feel faster.