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October 7, 2016 10:36
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For loop benchmark (http://jsbench.github.io/#67b13d4e78cdd0d7a7346410d5becf12) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>For loop benchmark</title> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script> | |
| <script src="./suite.js"></script> | |
| </head> | |
| <body> | |
| <h1>Open the console to view the results</h1> | |
| <h2><code>cmd + alt + j</code> or <code>ctrl + alt + j</code></h2> | |
| </body> | |
| </html> |
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| "use strict"; | |
| (function (factory) { | |
| if (typeof Benchmark !== "undefined") { | |
| factory(Benchmark); | |
| } else { | |
| factory(require("benchmark")); | |
| } | |
| })(function (Benchmark) { | |
| var suite = new Benchmark.Suite; | |
| Benchmark.prototype.setup = function () { | |
| var array = []; | |
| for (var i = 1000; i-- ;) array.push(i); | |
| var sum = 0 | |
| function add( n ) { | |
| sum += n; | |
| } | |
| function addFrom( array, i ) { | |
| sum += array[i]; | |
| } | |
| }; | |
| suite.add("Loop, function call", function () { | |
| // Loop, function call | |
| for ( var i = 1; i <= array.length; i++ ) { | |
| add( array[i] ); | |
| } | |
| }); | |
| suite.add("Loop, function call #2", function () { | |
| // Loop, function call #2 | |
| for ( var i = 1; i <= array.length; i++ ) { | |
| addFrom( array, i ); | |
| } | |
| }); | |
| suite.add("Loop, inlined code", function () { | |
| // Loop, inlined code | |
| for ( var i = 1; i <= array.length; i++ ) { | |
| sum += array[i]; | |
| } | |
| }); | |
| suite.add("Loop, cached value, function call", function () { | |
| // Loop, cached value, function call | |
| for ( var i = 1, l = array.length; i <= l; i++ ) { | |
| add( array[i] ); | |
| } | |
| }); | |
| suite.add("Loop, cached value, inlined code", function () { | |
| // Loop, cached value, inlined code | |
| for ( var i = 1, l = array.length; i <= l; i++ ) { | |
| sum += array[i]; | |
| } | |
| }); | |
| suite.add("Reverse loop, implicit comparison, function call", function () { | |
| // Reverse loop, implicit comparison, function call | |
| for ( var i = array.length; i--; ) { | |
| add( array[i] ); | |
| } | |
| }); | |
| suite.add("Reverse loop, implicit comparison, inlined code", function () { | |
| // Reverse loop, implicit comparison, inlined code | |
| for ( var i = array.length; i--; ) { | |
| sum += array[i]; | |
| } | |
| }); | |
| suite.add("Reverse loop, implicit comparison, function call #2", function () { | |
| // Reverse loop, implicit comparison, function call #2 | |
| for ( var i = array.length; i--; ) { | |
| addFrom( array, i ); | |
| } | |
| }); | |
| suite.on("cycle", function (evt) { | |
| console.log(" - " + evt.target); | |
| }); | |
| suite.on("complete", function (evt) { | |
| console.log(new Array(30).join("-")); | |
| var results = evt.currentTarget.sort(function (a, b) { | |
| return b.hz - a.hz; | |
| }); | |
| results.forEach(function (item) { | |
| console.log((idx + 1) + ". " + item); | |
| }); | |
| }); | |
| console.log("For loop benchmark"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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