Created
August 11, 2022 23:40
-
-
Save jridgewell/659bbd90bd6534565ecd10a4721d1565 to your computer and use it in GitHub Desktop.
Class Fields vs This Assignment vs Object.defineProperty(this) (https://jsbench.github.io/#659bbd90bd6534565ecd10a4721d1565) #jsbench #jsperf
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"/> | |
<title>Class Fields vs This Assignment vs Object.defineProperty(this)</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> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
"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 () { | |
class ClassFields { | |
a = Math.random(); | |
b = Math.random(); | |
} | |
function Assignment() { | |
this.a = Math.random(); | |
this.b = Math.random(); | |
} | |
function DefinePropertyNonEnumerable() { | |
this.a = Math.random(); | |
this.b = Math.random(); | |
} | |
function DefinePropertyNonEnumerableShorthand() { | |
this.a = Math.random(); | |
this.b = Math.random(); | |
} | |
function nonEnumerable(obj, prop, value) { | |
Object.defineProperty(obj, prop, { value, writable: true, enumerable: false }); | |
} | |
function nonEnumerableShorthand(obj, prop, value) { | |
Object.defineProperty(obj, prop, { value, writable: true }); | |
} | |
}; | |
suite.add("const obj = new ClassFields();", function () { | |
const obj = new ClassFields(); | |
const c = obj.a < 0.5 ? 'a' : obj.b < 0.5 ? 'b' : 'c'; | |
}); | |
suite.add("const obj = new Assignment();", function () { | |
const obj = new Assignment(); | |
const c = obj.a < 0.5 ? 'a' : obj.b < 0.5 ? 'b' : 'c'; | |
}); | |
suite.add("const obj = new DefinePropertyNonEnumerable();", function () { | |
const obj = new DefinePropertyNonEnumerable(); | |
const c = obj.a < 0.5 ? 'a' : obj.b < 0.5 ? 'b' : 'c'; | |
}); | |
suite.add("const obj = new DefinePropertyNonEnumerableShorthand();", function () { | |
const obj = new DefinePropertyNonEnumerableShorthand(); | |
const c = obj.a < 0.5 ? 'a' : obj.b < 0.5 ? 'b' : 'c'; | |
}); | |
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("Class Fields vs This Assignment vs Object.defineProperty(this)"); | |
console.log(new Array(30).join("-")); | |
suite.run(); | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment