warpech/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>DOM new children loop vs element callback</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 numberOfChildren = 4;

		function createDocumentFragmentWithSomeChildren() {
		  const fragm = document.createDocumentFragment();
		  for (let ii = 0; ii < numberOfChildren; ii++) {
		    const child = document.createElement('div');
		    fragm.appendChild(child);
		  }
		  return fragm;
		}

		function createDocumentFragmentWithSomeChildrenAndCallback(callb) {
		  const fragm = document.createDocumentFragment();
		  for (let ii = 0; ii < numberOfChildren; ii++) {
		    const child = document.createElement('div');
		    callb(child);
		    fragm.appendChild(child);
		  }
		  return fragm;
		}
	};


	suite.add("const fragm = createDocumentFragmentWithSomeChildren();", function () {
		const fragm = createDocumentFragmentWithSomeChildren();
		let child = fragm.firstChild;
		while (child) {
		  child.className = 'someClass';
		  child = child.nextSibling;
		}
	});

	suite.add("const fragm = createDocumentFragmentWithSomeChildrenAndCallback(child => child.className = 'someClass');", function () {
		const fragm = createDocumentFragmentWithSomeChildrenAndCallback(child => child.className = 'someClass');
	});

	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("DOM new children loop vs element callback");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>DOM new children loop vs element callback</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 numberOfChildren = 4;

	function createDocumentFragmentWithSomeChildren() {
	const fragm = document.createDocumentFragment();
	for (let ii = 0; ii < numberOfChildren; ii++) {
	const child = document.createElement('div');
	fragm.appendChild(child);
	}
	return fragm;
	}

	function createDocumentFragmentWithSomeChildrenAndCallback(callb) {
	const fragm = document.createDocumentFragment();
	for (let ii = 0; ii < numberOfChildren; ii++) {
	const child = document.createElement('div');
	callb(child);
	fragm.appendChild(child);
	}
	return fragm;
	}
	};


	suite.add("const fragm = createDocumentFragmentWithSomeChildren();", function () {
	const fragm = createDocumentFragmentWithSomeChildren();
	let child = fragm.firstChild;
	while (child) {
	child.className = 'someClass';
	child = child.nextSibling;
	}
	});

	suite.add("const fragm = createDocumentFragmentWithSomeChildrenAndCallback(child => child.className = 'someClass');", function () {
	const fragm = createDocumentFragmentWithSomeChildrenAndCallback(child => child.className = 'someClass');
	});

	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("DOM new children loop vs element callback");
	console.log(new Array(30).join("-"));
	suite.run();
	});