A nanosecond autoclicker is software or hardware designed to generate automated mouse clicks at intervals on the order of nanoseconds (10^-9 seconds). While the term evokes extremely high-speed automation, practical, legal, and technical limits make true nanosecond-rate clicking effectively impossible for general-use computing; this piece explains what the concept means, how people try to approximate it, where the limits lie, and typical use cases and risks.
It had stopped counting clicks.
If you are looking for a tool that approaches nanosecond speeds, look for these specific features: nanosecond autoclicker