Sets KeyboardSpeed to 31 (maximum, ~30 chars/sec) and KeyboardDelay to 0 (250 ms before repeat starts). Reverts to your prior values on revert.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-systemparametersinfow