Get unix time (nanoseconds) in blazing low latency with high precision

Related tags

Date and time rtsc
Overview

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.

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