The default auto-hide delay is unbearably slow, but luckily there is a way around it by running the following commands on the terminal app:

Warning

Don’t go around running commands on your terminal from random people on the internet. These are safe but do your research too before running them on your machine.

defaults write com.apple.dock autohide-delay -float 0
defaults write com.apple.dock autohide-time-modifier -float 0
killall Dock

The first two commands set the hide and reveal animation time to zero, and the last one restarts the Dock process so the change takes effect immediately.

Feel free to try other float values like 0.1 or 0.25 and see what looks best for you.

And in the case you want to revert back to normal, you can run:

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

Note

I’m a weirdo who doesn’t like the dock at the bottom of the screen. So usually, after this change, I also move the dock to the right.