RTSC

Get unix time (nanoseconds) in blazing low latency with high precision. About 5xx faster than SystemTime::now().

Performance

OS	CPU	benchmark	rtsc::unix_nano()	rtsc::unix_nano_std()
macOS Monterey	Intel Core i7-7700HQ	bench & bench_std	7 ns/iter (+/- 1)	32 ns/iter (+/- 2)

Usage

1. rtsc::init() for init env and functions. It'll find out tsc clock is reliable or not. Not thread safe.
2. rtsc::unix_nano() for get timestamp.
3. rtsc::calibrate() for calibrate the clock. Invoke it every 5 min is a good idea in background.

Details

You could find a Go version written me which explains how it works.