While generating nanosecond interrupts is theoretically possible, no consumer application can process them. Consider a video game running at 1000 frames per second—its input poll rate is still 1 millisecond. A nanosecond autoclicker would flood the target application’s input buffer with millions of clicks before the game completes a single frame. This leads to one of two outcomes:
Some professional-grade gaming mice or external hardware devices use on-board microprocessors to handle macros. Zero Latency: nanosecond autoclicker work