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Query selector speed comparison #jsbench #jsperf (https://jsbench.github.io/#c4cb4c2d5578e5e3900743d117538ec8) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Query selector speed comparison #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;
Benchmark.prototype.setup = function () {
const r = () => Math.floor(Math.random() * 100)
const $$ = document.querySelectorAll.bind(document)
$$('*').forEach(el => el.dataset.scRandOne = r())
$$('*').forEach(el => el.dataset.scRandThree = `${r()} ${r()} ${r()}`)
$$('*').forEach(el => el.className = el.className = (el.getAttribute('class')||'').replace(/\s*sc-\d+\s*/g,'') + ` sc-${r()}`)
};
suite.add("Array(100).fill().map((_,i) => $$(`[data-sc-rand-one=\"${i}\"]`).length)", function () {
Array(100).fill().map((_,i) => $$(`[data-sc-rand-one="${i}"]`).length)
});
suite.add("Array(100).fill().map((_,i) => $$(`[data-sc-rand-three~=\"${i}\"]`).length)", function () {
Array(100).fill().map((_,i) => $$(`[data-sc-rand-three~="${i}"]`).length)
});
suite.add("Array(100).fill().map((_,i) => $$(`.sc-${i}`).length)", function () {
Array(100).fill().map((_,i) => $$(`.sc-${i}`).length)
});
suite.add("Array(100).fill().map((_,i) => $$(`[data-sc-rand]`).length)", function () {
Array(100).fill().map((_,i) => $$(`[data-sc-rand]`).length)
});
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("Query selector speed comparison #jsbench #jsperf");
console.log(new Array(30).join("-"));
suite.run();
});
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