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Created January 30, 2017 11:17
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dynamic property assignment new vs old way (http://jsbench.github.io/#5f64c399dca1faff56f705e7efd46e7f) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>dynamic property assignment new vs old way</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("'use strict';", function () {
'use strict';
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
var lorem = { foo: 'bar' };
var ipsum = _defineProperty({
ley: 'bem'
}, lorem.foo, lorem);
});
suite.add("var lorem = { foo: 'bar' }", function () {
var lorem = { foo: 'bar' }
var ipsum = { ley: 'bem' }
ipsum[lorem.foo] = lorem
});
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("dynamic property assignment new vs old way");
console.log(new Array(30).join("-"));
suite.run();
});
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