To change the mouse pointer speed in Windows 10 use the Mouse Properties option window! (... See Image 1). The fastest way to open it, is via the Windows 10 Control Panel and a click on the Mouse icon! Or using the keyboard shortcut Windows + R and the command control.exe /name Microsoft.Mouse.
Jiffy is an informal term for any unspecified short period of time, as in I will be back in a jiffy. From this it has acquired a number of more precise applications for short, very short, or extremely short periods of time.
3. jiffy. The unit of time that is one jiffy cannot be defined relative to other units of time, it is separate, disassociated and different from the way other units are measured and experienced and cannot therefore be explained it terms of amount of time.