jridgewell/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>Native TreeWalker vs Handwritten TreeWalker</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 () {
		function treeWalker(root, visit) {
		    const walker = document.createTreeWalker(root, NodeFilter.SHOW_ALL, null, false);

		    let node;
		    while ((node = walker.nextNode())) {
		        visit(node);
		    }
		}

		function forwardTreeWalker(root, visit) {
		    let node = root.firstChild;
		    if (!node) {
		        return;
		    }

		    while (node !== root) {
		        const {nodeType} = node;
		        if (nodeType === 1 /* Node.ELEMENT_NODE */ ||
		            nodeType === 3 /* Node.TEXT_NODE */ ||
		            nodeType === 8 /* Node.COMMENT_NODE */) {
		            visit(node);
		        }

		        const fc = node.firstChild;
		        if (fc) {
		            node = fc;
		        } else {
		            let ns;
		            while ((ns = node.nextSibling) === null) {
		                if ((node = node.parentNode) === root) {
		                    return;
		                }
		            }
		            node = ns;
		        }
		    }
		}

		const BODY = document.body.cloneNode(true);
	};


	suite.add("Native TreeWalker", function () {
		/* Native TreeWalker */
		const nodes = [];
		treeWalker(BODY, (n) => nodes.push(n));
	});

	suite.add("Bredth-First TreeWalker", function () {
		/* Bredth-First TreeWalker */
		const nodes = [];
		forwardTreeWalker(BODY, (n) => nodes.push(n));
	});

	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("Native TreeWalker vs Handwritten TreeWalker");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Native TreeWalker vs Handwritten TreeWalker</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 () {
	function treeWalker(root, visit) {
	const walker = document.createTreeWalker(root, NodeFilter.SHOW_ALL, null, false);

	let node;
	while ((node = walker.nextNode())) {
	visit(node);
	}
	}

	function forwardTreeWalker(root, visit) {
	let node = root.firstChild;
	if (!node) {
	return;
	}

	while (node !== root) {
	const {nodeType} = node;
	if (nodeType === 1 /* Node.ELEMENT_NODE */ \|\|
	nodeType === 3 /* Node.TEXT_NODE */ \|\|
	nodeType === 8 /* Node.COMMENT_NODE */) {
	visit(node);
	}

	const fc = node.firstChild;
	if (fc) {
	node = fc;
	} else {
	let ns;
	while ((ns = node.nextSibling) === null) {
	if ((node = node.parentNode) === root) {
	return;
	}
	}
	node = ns;
	}
	}
	}

	const BODY = document.body.cloneNode(true);
	};


	suite.add("Native TreeWalker", function () {
	/* Native TreeWalker */
	const nodes = [];
	treeWalker(BODY, (n) => nodes.push(n));
	});

	suite.add("Bredth-First TreeWalker", function () {
	/* Bredth-First TreeWalker */
	const nodes = [];
	forwardTreeWalker(BODY, (n) => nodes.push(n));
	});

	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("Native TreeWalker vs Handwritten TreeWalker");
	console.log(new Array(30).join("-"));
	suite.run();
	});