My cursor speed was too slow, but I already had the speed maxed out in System Preferences.
Thankfully you can use defaults command line tool to increase the mouse speed beyond what you can do in the UI.
# read your current mouse speed
defaults read -g com.apple.mouse.scaling
# Set it to > 3, requires a restart to take effect
defaults write -g com.apple.mouse.scaling 9
There are plenty more things you can change with this tool, do man defaults to learn more.