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Last active November 17, 2016 01:06
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Finding elements off cached selector speed (http://jsbench.github.io/#002bcf9243e6c097a07ede2ee2c789e1) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Finding elements off cached selector speed</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="https://code.jquery.com/jquery-3.1.1.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>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<h1>H1</h1>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div class="div1">
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<h1>
<h3>H3</h3>
</h1>
<span>stuff</span>
<span>stuff</span>
<div class="div1">
<span>stuff</span>
<span>stuff</span>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<span>stuff</span>
<span>stuff</span>
<h1>
<h3>H3</h3>
</h1>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span>stuff</span>
<span><h3>H3</h3>
<h2>h2</h2>
</div>
<span>stuff</span>
<span>stuff</span>
<span><h3>H3</h3>
<h2>h2</h2>
</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div class="div1">stuff</div>
<div>stuff</div>
<h2>h2</h2>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
<div>stuff</div>
</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("document.querySelectorAll('.div1 h2, .div1 h3');", function () {
document.querySelectorAll('.div1 h2, .div1 h3');
});
suite.add("$(document.querySelectorAll('.div1 h2, .div1 h3'));", function () {
$(document.querySelectorAll('.div1 h2, .div1 h3'));
});
suite.add("$('.div1 h2, .div1 h3');", function () {
$('.div1 h2, .div1 h3');
});
suite.add("var div = document.querySelectorAll('.div1')[0];", function () {
var div = document.querySelectorAll('.div1')[0];
div.querySelectorAll("h2");
div.querySelectorAll("h3");
});
suite.add("var div = $(\".div1\");", function () {
var div = $(".div1");
div.find("h2");
div.find("h3");
});
suite.add("$('.div1 h2');", function () {
$('.div1 h2');
$('.div1 h3');
});
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("Finding elements off cached selector speed");
console.log(new Array(30).join("-"));
suite.run();
});
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