Qqwy/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>Comparison of 32-bit multiplication in JS</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 imulPolyfill(a, b) {
		  var ah = (a >>> 16) & 0xffff;
		  var al = a & 0xffff;
		  var bh = (b >>> 16) & 0xffff;
		  var bl = b & 0xffff;
		  // the shift by 0 fixes the sign on the high part
		  // the final |0 converts the unsigned value into a signed value
		  return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0)|0);
		};

		function randomInt(min, max) {
		  min = Math.ceil(min);
		  max = Math.floor(max);
		  return Math.floor(Math.random() * (max - min) + min); // The maximum is exclusive and the minimum is inclusive
		}

		var min_int32 = -2147483648;
		var max_int32 = 2147483647;

		var a = [];
		var b = [];
		var res = [];

		var count = 1000;


		for(var i = 0; i < count; ++i) {
		  a.push(randomInt(min_int32, max_int32));
		  b.push(randomInt(min_int32, max_int32));
		}
	};


	suite.add("res = [];", function () {
		res = [];

		for(var i = 0; i < count; ++i){
		  res.push((a[i] * b[i]) | 0);
		}
	});

	suite.add("res = [];", function () {
		res = [];

		for(var i = 0; i < count; ++i){
		  res.push(Math.imul(a[i], b[i]));
		}
	});

	suite.add("res = [];", function () {
		res = [];

		for(var i = 0; i < count; ++i){
		  res.push(((a[i] | 0) * (b[i] | 0)) | 0);
		}
	});

	suite.add("res = [];", function () {
		res = [];

		for(var i = 0; i < count; ++i){
		  res.push(imulPolyfill(a[i], b[i]));
		}
	});

	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("Comparison of 32-bit multiplication in JS");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Comparison of 32-bit multiplication in JS</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 imulPolyfill(a, b) {
	var ah = (a >>> 16) & 0xffff;
	var al = a & 0xffff;
	var bh = (b >>> 16) & 0xffff;
	var bl = b & 0xffff;
	// the shift by 0 fixes the sign on the high part
	// the final \|0 converts the unsigned value into a signed value
	return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0)\|0);
	};

	function randomInt(min, max) {
	min = Math.ceil(min);
	max = Math.floor(max);
	return Math.floor(Math.random() * (max - min) + min); // The maximum is exclusive and the minimum is inclusive
	}

	var min_int32 = -2147483648;
	var max_int32 = 2147483647;

	var a = [];
	var b = [];
	var res = [];

	var count = 1000;


	for(var i = 0; i < count; ++i) {
	a.push(randomInt(min_int32, max_int32));
	b.push(randomInt(min_int32, max_int32));
	}
	};


	suite.add("res = [];", function () {
	res = [];

	for(var i = 0; i < count; ++i){
	res.push((a[i] * b[i]) \| 0);
	}
	});

	suite.add("res = [];", function () {
	res = [];

	for(var i = 0; i < count; ++i){
	res.push(Math.imul(a[i], b[i]));
	}
	});

	suite.add("res = [];", function () {
	res = [];

	for(var i = 0; i < count; ++i){
	res.push(((a[i] \| 0) * (b[i] \| 0)) \| 0);
	}
	});

	suite.add("res = [];", function () {
	res = [];

	for(var i = 0; i < count; ++i){
	res.push(imulPolyfill(a[i], b[i]));
	}
	});

	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("Comparison of 32-bit multiplication in JS");
	console.log(new Array(30).join("-"));
	suite.run();
	});