anilanar/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>Different unmount strategies #harp</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;


	suite.add("const children = {};", function () {
		const children = {};
		const renderedChildren = {};

		for (let i = 0; i < 100; i++) {
		    children[i] = {key: i};
		}

		for (let i = 0; i < 90; i++) {
		    // (i / 16) % 2
		    if ((i >> 4) & 1) {
		      renderedChildren[i] = true;
		    }
		}

		for (let key in children) {
		    if (renderedChildren[key] !== true) {
		        children[key].unmount = true;
		    }
		}
	});

	suite.add("const children = [];", function () {
		const children = [];
		const renderedChildren = [];

		for (let i = 0; i < 100; i++) {
		    children.push({key: i});
		}

		for (let i = 0; i < 90; i++) {
		    // (i / 16) % 2
		    if ((i >> 4) & 1) {
		        renderedChildren.push(i);
		    }
		}

		outer:
		for (let child of children) {
		    for (let key of renderedChildren) {
		        if (child.key === key) {
		            continue outer;
		        }
		        child.unmount = true;
		    }
		}
	});

	suite.add("Sorted keys", function () {
		// Sorted keys

		const c = [];
		const rc = [];

		for (let i = 0; i < 100; i++) {
		    c.push({key: i});
		}

		for (let i = 0; i < 90; i++) {
		    // (i / 16) % 2
		    if ((i >> 4) & 1) {
		      rc.push(i);
		    }
		}

		let i = 0, j = 0;
		while (j < c.length && i < rc.length) {
		    if (rc[i] !== c[j].key) {
		        c[j].unmount = true;
		        j++;
		        continue;
		    }
		    i++; j++;
		}
	});

	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("Different unmount strategies #harp");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Different unmount strategies #harp</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;



	suite.add("const children = {};", function () {
	const children = {};
	const renderedChildren = {};

	for (let i = 0; i < 100; i++) {
	children[i] = {key: i};
	}

	for (let i = 0; i < 90; i++) {
	// (i / 16) % 2
	if ((i >> 4) & 1) {
	renderedChildren[i] = true;
	}
	}

	for (let key in children) {
	if (renderedChildren[key] !== true) {
	children[key].unmount = true;
	}
	}
	});

	suite.add("const children = [];", function () {
	const children = [];
	const renderedChildren = [];

	for (let i = 0; i < 100; i++) {
	children.push({key: i});
	}

	for (let i = 0; i < 90; i++) {
	// (i / 16) % 2
	if ((i >> 4) & 1) {
	renderedChildren.push(i);
	}
	}

	outer:
	for (let child of children) {
	for (let key of renderedChildren) {
	if (child.key === key) {
	continue outer;
	}
	child.unmount = true;
	}
	}
	});

	suite.add("Sorted keys", function () {
	// Sorted keys

	const c = [];
	const rc = [];

	for (let i = 0; i < 100; i++) {
	c.push({key: i});
	}

	for (let i = 0; i < 90; i++) {
	// (i / 16) % 2
	if ((i >> 4) & 1) {
	rc.push(i);
	}
	}

	let i = 0, j = 0;
	while (j < c.length && i < rc.length) {
	if (rc[i] !== c[j].key) {
	c[j].unmount = true;
	j++;
	continue;
	}
	i++; j++;
	}
	});

	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("Different unmount strategies #harp");
	console.log(new Array(30).join("-"));
	suite.run();
	});