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Last active January 19, 2017 23:45
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variable declaration vs assignment #jsbench #jsperf (http://jsbench.github.io/#ba82079dfdb177de201902ea3d7e9ea8) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>variable declaration vs assignment #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>
Raw
suite.js
"use strict";
(function (factory) {
if (typeof Benchmark !== "undefined") {
factory(Benchmark);
} else {
factory(require("benchmark"));
}
})(function (Benchmark) {
var suite = new Benchmark.Suite;
suite.add("let i, ii, iii;", function () {
let i, ii, iii;
let arr_i = [];
let arr_ii = [];
let arr_iii = [];
for (i = 0; i < 100; i++) {
arr_i.push(i);
for(ii = 0; ii < 100; ii++) {
arr_ii.push(ii);
for(iii = 0; iii < 100; iii++) {
arr_iii.push(iii);
}
}
}
});
suite.add("let arr_i = [];", function () {
let arr_i = [];
let arr_ii = [];
let arr_iii = [];
for (let i = 0; i < 100; i++) {
arr_i.push(i);
for(let ii = 0; ii < 100; ii++) {
arr_ii.push(ii);
for(let iii = 0; iii < 100; iii++) {
arr_iii.push(iii);
}
}
}
});
suite.add("var arr_i = [];", function () {
var arr_i = [];
var arr_ii = [];
var arr_iii = [];
for (var i = 0; i < 100; i++) {
arr_i.push(i);
for(var ii = 0; ii < 100; ii++) {
arr_ii.push(ii);
for(var iii = 0; iii < 100; iii++) {
arr_iii.push(iii);
}
}
}
});
suite.add("var i, ii, iii;", function () {
var i, ii, iii;
var arr_i = [];
var arr_ii = [];
var arr_iii = [];
for (i = 0; i < 100; i++) {
arr_i.push(i);
for(ii = 0; ii < 100; ii++) {
arr_ii.push(ii);
for(iii = 0; iii < 100; iii++) {
arr_iii.push(iii);
}
}
}
});
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("variable declaration vs assignment #jsbench #jsperf");
console.log(new Array(30).join("-"));
suite.run();
});
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