A robust benchmarking library that works on nearly all JavaScript platforms1, supports high-resolution timers, and returns statistically significant results. As seen on jsPerf.
We’ve got API docs and unit tests.
For a list of upcoming features, check out our roadmap.
Benchmark.js has been tested in at least Adobe AIR 3.1, Chrome 5-21, Firefox 1.5-13, IE 6-9, Opera 9.25-12.01, Safari 3-6, Node.js 0.8.6, Narwhal 0.3.2, RingoJS 0.8, and Rhino 1.7RC5.
In a browser or Adobe AIR:
<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
Via npm:
npm install benchmark
In Node.js and RingoJS v0.8.0+:
var Benchmark = require('benchmark');
Optionally, use the microtime module by Wade Simmons:
npm install microtime
In RingoJS v0.7.0-:
var Benchmark = require('benchmark').Benchmark;
In Rhino:
load('benchmark.js');
In an AMD loader like RequireJS:
require({ 'paths': { 'benchmark': 'path/to/benchmark' } }, ['benchmark'], function(Benchmark) { console.log(Benchmark.version); }); // or with platform.js // https://github.com/bestiejs/platform.js require({ 'paths': { 'benchmark': 'path/to/benchmark', 'platform': 'path/to/platform' } }, ['benchmark', 'platform'], function(Benchmark, platform) { Benchmark.platform = platform; console.log(Benchmark.platform.name); });
Usage 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#indexOf
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.