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window.matchMedia() #jsbench #jsperf (http://jsbench.github.io/#9fa2ce9499a06417c7432a23ce4c28d5) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>window.matchMedia() #jsbench #jsperf</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 () { | |
| function dpi() { | |
| function testDPI(dpi) { | |
| return window.matchMedia(`(max-resolution: ${dpi}dpi)`).matches; | |
| } | |
| function bisect(low, high, func) { | |
| const mid = parseInt(((high - low) / 2) + low, 10); | |
| if (high - low <= 1) { | |
| return func(high) ? high : low; | |
| } | |
| if (func(mid)) { | |
| return bisect(low, mid, func); | |
| } | |
| return bisect(mid, high, func); | |
| } | |
| try { | |
| const dpi = bisect(0, 800, testDPI); | |
| return dpi >= 96 ? dpi : 96; | |
| } catch (e) { | |
| return 96; | |
| } | |
| } | |
| __dpi = 0 | |
| }; | |
| Benchmark.prototype.teardown = function () { | |
| console.log(__dpi) | |
| }; | |
| suite.add("__dpi += dpi()", function () { | |
| __dpi += dpi() | |
| }); | |
| suite.add("__dpi += window.devicePixelRatio * 96", function () { | |
| __dpi += window.devicePixelRatio * 96 | |
| }); | |
| 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.matchMedia() #jsbench #jsperf"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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