The fastest person to restore a Rubik's cube is Ron van Bruchem who managed it in 9.55 seconds at the Dutch Championships in 2007.
Fastest One-handed
15.81 seconds - Thibaut Jacquinot
Fastest Blindfolded
23.06 seconds - Clément Gallet
The youngest person to solve a Rubik's Cube in a competition was Enxi Xie (China), who was 4 yrs 6 mths 10 days old when he solved the cube in 1:28.06 minutes.