Mac OS X dock hiding speed!
If you want to increase the speed that the dock hides and shows, and remove the delay so that you don’t waste those precious milliseconds, copy/paste these commands into your terminal:
defaults write com.apple.dock autohide-time-modifier -float 0.05
defaults write com.apple.dock autohide-delay -float 0
killall Dock
You now have a fast hiding dock!
