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@arccoza
Last active December 8, 2017 07:39
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Fastest way to fill an array #jsbench #jsperf (http://jsbench.github.io/#188cbe041026832a50a61a0fd674e1be) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Fastest way to fill an array #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>
"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 () {
let n = 120000;
var arr = null;
};
suite.add("(arr = []).length = n;", function () {
(arr = []).length = n;
for (let i = 0; i < n; ++i) {
arr[i] = 0;
}
});
suite.add("(arr = []).length = n;", function () {
(arr = []).length = n;
let i = 0;
while (i < n) {
arr[i] = 0;
i++;
}
});
suite.add("arr = new Array(n);", function () {
arr = new Array(n);
for (let i = 0; i < n; arr[i++] = 0);
});
suite.add("arr = new Array(n);", function () {
arr = new Array(n);
for (let i = n - 1; i > -1; arr[i--] = 0);
});
suite.add("arr = [];", function () {
arr = [];
for (let i = 0; i < n; arr[i++] = 0);
});
suite.add("arr = new Array(n);", function () {
arr = new Array(n);
var i = 0;
n%2 ? (i = 1, arr[0] = 1, arr) : arr;
for (; i < n; arr[i++] = 0, arr[i++] = 0);
});
suite.add("arr = new Array(n);", function () {
arr = new Array(n);
arr = arr.fill(0);
});
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("Fastest way to fill an array #jsbench #jsperf");
console.log(new Array(30).join("-"));
suite.run();
});
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