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Last active January 29, 2020 11:30
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property access like an object vs like an array (http://jsbench.github.io/#b817bef55c27b14a3819f0ff2e16fdc1) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>property access like an object vs like an array</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 count = 0
const data = {
a: 1,
b: {
c: 2
}
}
const key = (value) => `${value}`
const A = key('a')
const B = key('b')
const C = key('c')
};
suite.add("if (data.a === 1 && data.b.c === 2)", function () {
if (data.a === 1 && data.b.c === 2)
count++
});
suite.add("if (data[\"a\"] === 1 && data[\"b\"][\"c\"] === 2)", function () {
if (data["a"] === 1 && data["b"]["c"] === 2)
count++
});
suite.add("if (data[A] === 1 && data[B][C] === 2)", function () {
if (data[A] === 1 && data[B][C] === 2)
count++
});
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("property access like an object vs like an array");
console.log(new Array(30).join("-"));
suite.run();
});
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