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Created August 9, 2018 08:44
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index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>foreach or for(i)</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>
Raw
suite.js
"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 () {
window.ar1 = new Array(10000);
window.ar2 = new Array(10000);
for (let i = 0; i < 10000; i++) {
ar1[i] = i;
}
};
suite.add("ar1.forEach(function(num, i) {", function () {
ar1.forEach(function(num, i) {
ar2[i] = num * num;
});
});
suite.add("for (let i = 0; i < ar1.length; i++) {", function () {
for (let i = 0; i < ar1.length; i++) {
const num = ar1[i];
ar2[i] = num * num;
}
});
suite.add("let i = ar1.length;", function () {
let i = ar1.length;
while (i--) {
const num = ar1[i];
ar2[i] = num * num;
}
});
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("foreach or for(i)");
console.log(new Array(30).join("-"));
suite.run();
});
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