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January 20, 2017 14:14
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ES6 array spread VS Array.concat (http://jsbench.github.io/#c2db1fa1c198d8731e3a4b4ef2ed96d3) #jsbench #jsperf
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"/> | |
<title>ES6 array spread VS Array.concat</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; | |
suite.add("ES6 array spread", function () { | |
// ES6 array spread | |
var arr1 = [1, 2, 3]; | |
var arr2 = [4, 5, 6]; | |
var total = 0; | |
for (var i = 0; i < 1000000; i++) { | |
var arr3 = [...arr1, ...arr2]; | |
total += arr3.length; | |
} | |
console.log(total); | |
}); | |
suite.add("Array.concat", function () { | |
// Array.concat | |
var arr1 = [1, 2, 3]; | |
var arr2 = [4, 5, 6]; | |
var total = 0; | |
for (var i = 0; i < 1000000; i++) { | |
var arr3 = arr1.concat(arr2); | |
total += arr3.length; | |
} | |
console.log(total); | |
}); | |
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("ES6 array spread VS Array.concat"); | |
console.log(new Array(30).join("-")); | |
suite.run(); | |
}); |
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