Like performance.now() but in nanoseconds.

Although the value is always in nanoseconds, the time resolution might be less precise. For example, in Node.js, it is 1ns, but in Firefox it is 1ms and in Chrome it is 0.1ms.

Hire me

Please reach out if you're looking for a Node.js API or CLI engineer (11 years of experience). Most recently I have been Netlify Build's and Netlify Plugins' technical lead for 2.5 years. I am available for full-time remote positions.

Example

import preciseNow from 'precise-now'

const start = preciseNow()
const end = preciseNow()
const duration = end - start

Install

npm install precise-now

This package works in both Node.js >=18.18.0 and browsers.

This is an ES module. It must be loaded using an import or import() statement, not require(). If TypeScript is used, it must be configured to output ES modules, not CommonJS.

API

preciseNow()

Return value: number

Return the number of nanoseconds since the time origin.

Related projects

• time-resolution: Find the system's time resolution

Support

For any question, don't hesitate to submit an issue on GitHub.

Everyone is welcome regardless of personal background. We enforce a Code of conduct in order to promote a positive and inclusive environment.

Contributing

This project was made with ❤️. The simplest way to give back is by starring and sharing it online.

If the documentation is unclear or has a typo, please click on the page's Edit button (pencil icon) and suggest a correction.

If you would like to help us fix a bug or add a new feature, please check our guidelines. Pull requests are welcome!