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for-of loop vs forEach (https://jsbench.github.io/#cec5fd6009b622c72311e8f447e101be) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>for-of loop vs forEach</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 i, | |
| value, | |
| length, | |
| values = [], | |
| sum = 0, | |
| context = values; | |
| for (i = 0; i < 10000; i++) { | |
| values[i] = Math.random(); | |
| } | |
| function add(val) { | |
| sum += val; | |
| } | |
| }; | |
| suite.add("values.forEach(add);", function () { | |
| values.forEach(add); | |
| }); | |
| suite.add("for (let i = 0; i < values.length; i++) {", function () { | |
| for (let i = 0; i < values.length; i++) { | |
| sum += values[i]; | |
| } | |
| }); | |
| suite.add("for (const value of values) {", function () { | |
| for (const value of values) { | |
| sum += value; | |
| } | |
| }); | |
| suite.add("for (const i in values) {", function () { | |
| for (const i in values) { | |
| sum += values[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-of loop vs forEach"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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