i'm under the impression that hitting 3 will increase your render time (since its a render time smoothing) but actually smoothing will slow down your computer when working in the scene since the polycount quadruples for each subdivision.
so i just hit 3...
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D