milahu/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>performance of different loop types #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>

## 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 token_list =
		document.body.innerHTML.split(/([^\d\w\s]|\s+)/g)
		.filter(Boolean);

		console.log('token_list.length = '+token_list.length);
	};


	suite.add("for loop", function () {
		// for loop
		let c = 0;
		for (let i = 0; i < token_list.length; i++) {
		    c += token_list[i].length;
		}
	});

	suite.add("while loop", function () {
		// while loop
		let c = 0;
		let i = 0;
		while (token_list[i]) {
		    c += token_list[i++].length;
		}
	});

	suite.add("forEach loop", function () {
		// forEach loop
		let c = 0;
		token_list.forEach(t => { c += t.length; })
	});

	suite.add("map loop", function () {
		// map loop
		let c = 0;
		token_list.map(t => { c += t.length; })
	});

	suite.add("for of loop", function () {
		// for of loop
		let c = 0;
		for (const t of token_list) {
		    c += t.length;
		}
	});

	suite.add("unrolled for loop", function () {
		// unrolled for loop
		let c = 0;
		try {
		    for (let i = 0; i < token_list.length; ) {
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		        c += token_list[i++].length;
		    }
		} catch (_) {}
	});

	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("performance of different loop types #jsbench #jsperf");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>performance of different loop types #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>
	"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 token_list =
	document.body.innerHTML.split(/([^\d\w\s]\|\s+)/g)
	.filter(Boolean);

	console.log('token_list.length = '+token_list.length);
	};


	suite.add("for loop", function () {
	// for loop
	let c = 0;
	for (let i = 0; i < token_list.length; i++) {
	c += token_list[i].length;
	}
	});

	suite.add("while loop", function () {
	// while loop
	let c = 0;
	let i = 0;
	while (token_list[i]) {
	c += token_list[i++].length;
	}
	});

	suite.add("forEach loop", function () {
	// forEach loop
	let c = 0;
	token_list.forEach(t => { c += t.length; })
	});

	suite.add("map loop", function () {
	// map loop
	let c = 0;
	token_list.map(t => { c += t.length; })
	});

	suite.add("for of loop", function () {
	// for of loop
	let c = 0;
	for (const t of token_list) {
	c += t.length;
	}
	});

	suite.add("unrolled for loop", function () {
	// unrolled for loop
	let c = 0;
	try {
	for (let i = 0; i < token_list.length; ) {
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	c += token_list[i++].length;
	}
	} catch (_) {}
	});

	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("performance of different loop types #jsbench #jsperf");
	console.log(new Array(30).join("-"));
	suite.run();
	});