A robust benchmarking library that works on nearly all JavaScript platforms, supports high-resolution timers, & returns statistically significant results. As seen on jsPerf.
- API Documentation
- Check out our unit tests & roadmap
Benchmark.js’ only hard dependency is Lo-Dash. Include platform.js to populate Benchmark.platform.
In a browser:
<script src="lodash.js"></script>
<script src="platform.js"></script>
<script src="benchmark.js"></script>Optionally, expose Java’s nanosecond timer by adding the nano applet to the <body>:
<applet code="nano" archive="nano.jar"></applet>Or enable Chrome’s microsecond timer by using the command line switch:
--enable-benchmarking
In an AMD loader:
require({
'paths': {
'benchmark': 'path/to/benchmark',
'lodash': 'path/to/lodash',
'platform': 'path/to/platform'
}
},
['benchmark'], function(Benchmark) {/*…*/});Using npm:
$ npm i --save benchmarkIn Node.js:
var Benchmark = require('benchmark');Optionally, use the microtime module by Wade Simmons:
npm install microtimeUsage example:
var suite = new Benchmark.Suite;
// add tests
suite.add('RegExp#test', function() {
/o/.test('Hello World!');
})
.add('String#indexOf', function() {
'Hello World!'.indexOf('o') > -1;
})
// add listeners
.on('cycle', function(event) {
console.log(String(event.target));
})
.on('complete', function() {
console.log('Fastest is ' + this.filter('fastest').pluck('name'));
})
// run async
.run({ 'async': true });
// logs:
// => RegExp#test x 4,161,532 +-0.99% (59 cycles)
// => String#indexOf x 6,139,623 +-1.00% (131 cycles)
// => Fastest is String#indexOfTested in Chrome 38-39, Firefox 33-34, IE 6-11, Opera 25-26, Safari 5-8, Node.js 0.8.26~0.10.33, PhantomJS 1.9.7, RingoJS 0.11, & Rhino 1.7RC5.
Benchmark.js is part of the BestieJS “Best in Class” module collection. This means we promote solid browser/environment support, ES5+ precedents, unit testing, & plenty of documentation.
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| Mathias Bynens | John-David Dalton |
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| Kit Cambridge |