function

nanoseconds

function nanoseconds(): number;

Returns the number of nanoseconds since the process was started, measured with a high-resolution monotonic system timer.

JavaScript numbers are IEEE 754 doubles, which represent integers exactly only up to 2^53 - 1 (Number.MAX_SAFE_INTEGER). After about 14.8 weeks of uptime the nanosecond count exceeds that, so the returned value keeps counting but loses precision.

@returns

Nanoseconds since the process started