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129 lines
3.7 KiB
Markdown
129 lines
3.7 KiB
Markdown
# Benchmark.js <sup>v1.0.0</sup>
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[](http://travis-ci.org/bestiejs/benchmark.js)
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A [robust](http://calendar.perfplanet.com/2010/bulletproof-javascript-benchmarks/ "Bulletproof JavaScript benchmarks") benchmarking library that works on nearly all JavaScript platforms<sup><a name="fnref1" href="#fn1">1</a></sup>, supports high-resolution timers, and returns statistically significant results. As seen on [jsPerf](http://jsperf.com/).
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## Download
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* [Development source](https://raw.github.com/bestiejs/benchmark.js/v1.0.0/benchmark.js)
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## Dive in
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We’ve got [API docs](http://benchmarkjs.com/docs) and [unit tests](http://benchmarkjs.com/tests).
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For a list of upcoming features, check out our [roadmap](https://github.com/bestiejs/benchmark.js/wiki/Roadmap).
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## Support
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Benchmark.js has been tested in at least Chrome 5~27, Firefox 2~21, IE 6-10, Opera 9.25-12, Safari 3-6, Node.js 0.4.8-0.10.7, Narwhal 0.3.2, PhantomJS 1.9.0, RingoJS 0.9, and Rhino 1.7RC5.
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## Installation and usage
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Benchmark.js’ only hard dependency is [Lo-Dash](http://lodash.com/).
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In a browser:
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```html
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<script src="lodash.js"></script>
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<script src="benchmark.js"></script>
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```
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Optionally, expose Java’s nanosecond timer by adding the `nano` applet to the `<body>`:
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```html
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<applet code="nano" archive="nano.jar"></applet>
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```
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Or enable Chrome’s microsecond timer by using the [command line switch](http://peter.sh/experiments/chromium-command-line-switches/#enable-benchmarking):
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--enable-benchmarking
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Via [npm](http://npmjs.org/):
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```bash
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npm install benchmark
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```
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In [Node.js](http://nodejs.org/) and [RingoJS v0.8.0+](http://ringojs.org/):
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```js
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var Benchmark = require('benchmark');
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```
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Optionally, use the [microtime module](https://github.com/wadey/node-microtime) by Wade Simmons:
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```bash
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npm install microtime
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```
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In [RingoJS v0.7.0-](http://ringojs.org/):
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```js
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var Benchmark = require('benchmark').Benchmark;
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```
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In [Rhino](http://www.mozilla.org/rhino/):
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```js
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load('benchmark.js');
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```
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In an AMD loader like [RequireJS](http://requirejs.org/):
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```js
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require({
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'paths': {
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'benchmark': 'path/to/benchmark',
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'lodash': 'path/to/lodash',
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'platform': 'path/to/platform'
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}
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},
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['benchmark'], function(Benchmark) {
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console.log(Benchmark.platform.name);
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});
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```
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Usage example:
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```js
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var suite = new Benchmark.Suite;
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// add tests
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suite.add('RegExp#test', function() {
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/o/.test('Hello World!');
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})
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.add('String#indexOf', function() {
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'Hello World!'.indexOf('o') > -1;
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})
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// add listeners
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.on('cycle', function(event) {
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console.log(String(event.target));
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})
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.on('complete', function() {
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console.log('Fastest is ' + this.filter('fastest').pluck('name'));
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})
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// run async
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.run({ 'async': true });
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// logs:
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// > RegExp#test x 4,161,532 +-0.99% (59 cycles)
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// > String#indexOf x 6,139,623 +-1.00% (131 cycles)
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// > Fastest is String#indexOf
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```
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## BestieJS
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Benchmark.js is part of the BestieJS *"Best in Class"* module collection. This means we promote solid browser/environment support, ES5+ precedents, unit testing, and plenty of documentation.
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## Authors
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| [](http://twitter.com/mathias "Follow @mathias on Twitter") | [](http://twitter.com/jdalton "Follow @jdalton on Twitter") |
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| [Mathias Bynens](http://mathiasbynens.be/) | [John-David Dalton](http://allyoucanleet.com/) |
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## Contributors
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| [](https://twitter.com/kitcambridge "Follow @kitcambridge on Twitter") |
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| [Kit Cambridge](http://kitcambridge.github.io/) |
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