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59 lines
1.7 KiB
Markdown
59 lines
1.7 KiB
Markdown
<h1 align="center">Welcome to atomic-sleep ⏱️</h1>
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<p>
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<img alt="Version" src="https://img.shields.io/badge/version-1.0.0-blue.svg?cacheSeconds=2592000" />
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<a href="#" target="_blank">
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<img alt="License: MIT" src="https://img.shields.io/badge/License-MIT-yellow.svg" />
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</a>
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<a href="https://twitter.com/davidmarkclem" target="_blank">
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<img alt="Twitter: davidmarkclem" src="https://img.shields.io/twitter/follow/davidmarkclem.svg?style=social" />
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</a>
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</p>
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> Zero CPU overhead, zero dependency, true event-loop blocking sleep
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## Usage
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```js
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const sleep = require('atomic-sleep')
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console.time('sleep')
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setTimeout(() => { console.timeEnd('sleep') }, 100)
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sleep(1000)
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```
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The `console.time` will report a time of just over 1000ms despite the `setTimeout`
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being 100ms. This is because the event loop is paused for 1000ms and the setTimeout
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fires immediately after the event loop is no longer blocked (as more than 100ms have passed).
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## Install
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```sh
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npm install
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```
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## Run tests
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```sh
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npm test
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```
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## Support
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Node and Browser versions that support both `SharedArrayBuffer` and `Atomics` will have (virtually) zero CPU overhead sleep.
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For Node, Atomic Sleep can provide zero CPU overhead sleep from Node 8 and up.
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For browser support see https://caniuse.com/#feat=sharedarraybuffer and https://caniuse.com/#feat=mdn-javascript_builtins_atomics.
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For older Node versions and olders browsers we fall back to blocking the event loop in a way that will cause a CPU spike.
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## Author
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👤 **David Mark Clements (@davidmarkclem)**
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* Twitter: [@davidmarkclem](https://twitter.com/davidmarkclem)
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* Github: [@davidmarkclements](https://github.com/davidmarkclements)
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