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performance of different loop types #jsbench #jsperf (http://jsbench.github.io/#6f65c587af9277325bcda0e69ba44d5f) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>performance of different loop types #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 () { | |
| const token_list = | |
| document.body.innerHTML.split(/([^\d\w\s]|\s+)/g) | |
| .filter(Boolean); | |
| console.log('token_list.length = '+token_list.length); | |
| }; | |
| suite.add("for loop", function () { | |
| // for loop | |
| let c = 0; | |
| for (let i = 0; i < token_list.length; i++) { | |
| c += token_list[i].length; | |
| } | |
| }); | |
| suite.add("while loop", function () { | |
| // while loop | |
| let c = 0; | |
| let i = 0; | |
| while (token_list[i]) { | |
| c += token_list[i++].length; | |
| } | |
| }); | |
| suite.add("forEach loop", function () { | |
| // forEach loop | |
| let c = 0; | |
| token_list.forEach(t => { c += t.length; }) | |
| }); | |
| suite.add("map loop", function () { | |
| // map loop | |
| let c = 0; | |
| token_list.map(t => { c += t.length; }) | |
| }); | |
| suite.add("for of loop", function () { | |
| // for of loop | |
| let c = 0; | |
| for (const t of token_list) { | |
| c += t.length; | |
| } | |
| }); | |
| suite.add("unrolled for loop", function () { | |
| // unrolled for loop | |
| let c = 0; | |
| try { | |
| for (let i = 0; i < token_list.length; ) { | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| c += token_list[i++].length; | |
| } | |
| } catch (_) {} | |
| }); | |
| 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("performance of different loop types #jsbench #jsperf"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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