A nanosecond-capable clicker theoretically attempts to click at a rate that far exceeds the polling rate of standard USB peripherals. The Reality of "Nanosecond" Speed
Despite the physical limitations, the search for nanosecond clicking stems from three areas:
High-speed scripts often need administrative privileges to "inject" clicks into other high-priority applications or games. A Note on Safety and Fair Play Using a nanosecond autoclicker can be a double-edged sword.