How can I make auto-hide/show for the dock faster?
To make the Dock instantly leap back into view when it’s needed, rather than slide, open a Terminal window and type the following:

defaults write com.apple.dock autohide-time-modifier -int 0;killall Dock




I find this useful, but if you’d like the animation for the dock to reappear to last for a split-second, try the following:

defaults write com.apple.dock autohide-time-modifier -float 0.15;killall Dock


To explain, changing "0.15" with any number can let you tailor things as it represents the time in seconds taken for the dock to reappear fully.



To revert back to the default sliding effect, open a Terminal window and type the following:

defaults delete com.apple.dock autohide-time-modifier;killall Dock