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#slice #rest #2for (http://jsbench.github.io/#0eac5d083e6b6e05a1614f26feefd1df) #jsbench #jsperf
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title>#slice #rest #2for</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 rnd = () => String(Math.random); | |
| var slice = [].slice; | |
| var results = []; | |
| function resolve(callback) { | |
| var retVal = callback(rnd(), rnd(), rnd(), rnd(), rnd()); | |
| // console.log(retVal); | |
| // if (retVal.length !== 5) { | |
| // throw 'FAIL:retVal'; | |
| // } | |
| results.push(retVal); | |
| } | |
| }; | |
| Benchmark.prototype.teardown = function () { | |
| if (results.length < 1) { | |
| throw 'FAIL:results'; | |
| } | |
| }; | |
| suite.add("slice", function () { | |
| /** slice **/ | |
| resolve(function classnames() { | |
| let className = ''; | |
| const uniqueCache = new Set(); | |
| // Use arguments instead rest operator for better performance. | |
| const classNameList = [].slice.call(arguments); | |
| for (const value of classNameList) { | |
| if (value === '' || value === undefined || uniqueCache.has(value)) { | |
| continue; | |
| } | |
| uniqueCache.add(value); | |
| if (className.length > 0) { | |
| className += ' '; | |
| } | |
| className += value; | |
| } | |
| return className; | |
| }) | |
| }); | |
| suite.add("rest", function () { | |
| // rest | |
| resolve(function classnames(...strings) { | |
| let className = ''; | |
| const uniqueCache = new Set(); | |
| const classNameList = strings.join(' ').split(' '); | |
| for (const value of classNameList) { | |
| if (value === '' || uniqueCache.has(value)) { | |
| continue; | |
| } | |
| uniqueCache.add(value); | |
| if (className.length > 0) className += ' '; | |
| className += value; | |
| } | |
| return className; | |
| }) | |
| }); | |
| suite.add("2 for", function () { | |
| /** 2 for **/ | |
| resolve(function classnames() { | |
| let className = ''; | |
| const uniqueCache = new Set(); | |
| // Use arguments instead rest operator for better performance. | |
| // const classNameList = [].slice.call(arguments); | |
| for (let i; i < arguments.length; i++) { | |
| const classNameList = arguments[i].split(' '); | |
| for (const value of classNameList) { | |
| if (value === '' || uniqueCache.has(value)) { | |
| continue; | |
| } | |
| uniqueCache.add(value); | |
| if (className.length > 0) { | |
| className += ' '; | |
| } | |
| className += value; | |
| } | |
| } | |
| return className; | |
| }) | |
| }); | |
| 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("#slice #rest #2for"); | |
| console.log(new Array(30).join("-")); | |
| suite.run(); | |
| }); |
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