Because mutter gnome desktop's compositer default has vsync enabled it's nice to disable it since it can be wonky at time with either 2 monitores with different refresh rates, or if you game on linux it's just shit.

To Globaly disable mutter vsync you can create a .sh file under /etc/profile.d/, it can be called anything but for sanity's sake I have called it mutter.sh

All the file need to contain is export CLUTTER_VBLANK=none

# touch /etc/profile.d/mutter.sh && echo "export CLUTTER_VBLANK=none" > /etc/profile.d/mutter.sh

Now all you need to do is either log out or reboot you have disabled that pesky vsync

GLHF