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window.innerWidth vs. getBoundingClientRect (http://jsbench.github.io/#5cf288a44974181bc68d90267b720256) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>window.innerWidth vs. getBoundingClientRect</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 result = 0; | |
| var element = document.createElement('div'); | |
| element.style.position = 'absolute'; | |
| element.style.top = '-300px'; | |
| element.style.left = '-300px'; | |
| document.body.appendChild(element); | |
| }; | |
| Benchmark.prototype.teardown = function () { | |
| if (result === 0) { | |
| throw 'error'; | |
| } | |
| }; | |
| suite.add("offsetWidth", function () { | |
| /* offsetWidth */ | |
| element.style.padding = Math.random() * 100 + 'px'; | |
| result += window.innerWidth; | |
| }); | |
| suite.add("getBoundingClientRect()", function () { | |
| /* getBoundingClientRect() */ | |
| element.style.padding = Math.random() * 100 + 'px'; | |
| result += element.getBoundingClientRect().width; | |
| }); | |
| 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("window.innerWidth vs. getBoundingClientRect"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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