Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/ehmicky/precise-now
Like `performance.now()` but in nanoseconds
https://github.com/ehmicky/precise-now
browsers date date-now hrtime javascript library microseconds milliseconds nanosecond-resolution nanoseconds nodejs performance performance-analysis performance-metrics performance-monitoring performance-testing performance-tuning resolution seconds typescript
Last synced: 17 days ago
JSON representation
Like `performance.now()` but in nanoseconds
- Host: GitHub
- URL: https://github.com/ehmicky/precise-now
- Owner: ehmicky
- License: mit
- Created: 2019-08-30T12:08:13.000Z (about 5 years ago)
- Default Branch: main
- Last Pushed: 2024-09-14T16:52:58.000Z (2 months ago)
- Last Synced: 2024-10-22T01:17:10.730Z (23 days ago)
- Topics: browsers, date, date-now, hrtime, javascript, library, microseconds, milliseconds, nanosecond-resolution, nanoseconds, nodejs, performance, performance-analysis, performance-metrics, performance-monitoring, performance-testing, performance-tuning, resolution, seconds, typescript
- Language: TypeScript
- Homepage:
- Size: 6.42 MB
- Stars: 6
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
Awesome Lists containing this project
README
[](https://www.npmjs.com/package/precise-now)
[](https://unpkg.com/precise-now?module)
[](/src/main.ts)
[](https://codecov.io/gh/ehmicky/precise-now)
[](https://bundlephobia.com/package/precise-now)
[](https://fosstodon.org/@ehmicky)
[](https://medium.com/@ehmicky)
Like
[`performance.now()`](https://developer.mozilla.org/en-US/docs/Web/API/Performance/now)
but in nanoseconds.
Although the value is always in nanoseconds, the
[time resolution](https://github.com/ehmicky/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](https://www.linkedin.com/feed/update/urn:li:activity:7117265228068716545/)
if you're looking for a Node.js API or CLI engineer (11 years of experience).
Most recently I have been [Netlify Build](https://github.com/netlify/build)'s
and [Netlify Plugins](https://www.netlify.com/products/build/plugins/)'
technical lead for 2.5 years. I am available for full-time remote positions.
# Example
```js
import preciseNow from 'precise-now'
const start = preciseNow()
const end = preciseNow()
const duration = end - start
```
# Install
```bash
npm install precise-now
```
This package works in both Node.js >=18.18.0 and
[browsers](https://raw.githubusercontent.com/ehmicky/dev-tasks/main/src/browserslist).
This is an ES module. It must be loaded using
[an `import` or `import()` statement](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c),
not `require()`. If TypeScript is used, it must be configured to
[output ES modules](https://www.typescriptlang.org/docs/handbook/esm-node.html),
not CommonJS.
# API
## preciseNow()
_Return value_: `number`
Return the number of nanoseconds since the
[time origin](https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp#the_time_origin).
# Related projects
- [`time-resolution`](https://github.com/ehmicky/time-resolution): Find the
system's time resolution
# Support
For any question, _don't hesitate_ to [submit an issue on GitHub](../../issues).
Everyone is welcome regardless of personal background. We enforce a
[Code of conduct](CODE_OF_CONDUCT.md) 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](CONTRIBUTING.md). Pull requests are welcome!