I used this link https://paulminors.com/how-to-speed-up-mouse-tracking-on-mac/ which has a bash line that updates your mouse speed (beyond the default maximum):
defaults write -g com.apple.mouse.scaling your_mouse_speed
However, in order to make it work, you need to restart, which is kind of a pain. I assume what it's doing is really to change the preferences pane or plist? Thus, there should be a way to reboot just the mouse or the process that draws from the mouse settings. For example, if you change your speech synthesis .plist, you just reboot the speech synthesis core using a terminal command like
Is there a way to do this with the mouse settings? I can obviously restart, but I'd rather not since I want this to be a quick thing.