Created
April 7, 2019 11:49
-
-
Save Lodin/abf388900fe448ab9b3ffc5f10719cf9 to your computer and use it in GitHub Desktop.
for, for-of, forEach loop comparison (http://jsbench.github.io/#abf388900fe448ab9b3ffc5f10719cf9) #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>for, for-of, forEach loop comparison</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 () { | |
const arr = new Array(100000); | |
for (let i = 0; i < arr.length; i++) { | |
arr[i] = i * 100; | |
} | |
}; | |
suite.add("for (let i = 0; i < arr.length; i++) {", function () { | |
for (let i = 0; i < arr.length; i++) { | |
const a = arr[i]; | |
} | |
}); | |
suite.add("for (const el of arr) {", function () { | |
for (const el of arr) { | |
const a = el; | |
} | |
}); | |
suite.add("arr.forEach(el => {", function () { | |
arr.forEach(el => { | |
const a = el; | |
}); | |
}); | |
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("for, for-of, forEach loop comparison"); | |
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