determin1st/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>+++ operator #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 () {
		function arrayPush$(a1, a2)
		{
		    var i = -1,
		        j = a2.length;

		    while (++i < j) {
		        a1[a1.length] = a2[i];
		    }
		}
		function arrayPush$$(a1, a2)
		{
		    for (var i = 0, j = a2.length; i < j; ++i) {
		        a1[a1.length] = a2[i];
		    }
		}
		function createRandomArray(n)
		{
		    var a = [], i = -1;
		    while (++i < n) {
		        a[i] = Math.floor(Math.random() * (n + 1));
		    }
		    return a;
		}

		var a1,a2,a3;

		a2 = createRandomArray(20);
		a3 = createRandomArray(100);
	};


	suite.add("a1 = a3.slice();", function () {
		a1 = a3.slice();
		arrayPush$(a1, a2);
	});

	suite.add("a1 = a3.slice();", function () {
		a1 = a3.slice();
		a1.push(...a2);
	});

	suite.add("a1 = a3.slice();", function () {
		a1 = a3.slice();
		a1 = a1.concat(a2);// ++=
	});

	suite.add("a1 = a3.slice();", function () {
		a1 = a3.slice();
		arrayPush$$(a1, a2);
	});

	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("+++ operator #jsbench #jsperf");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>+++ operator #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 () {
	function arrayPush$(a1, a2)
	{
	var i = -1,
	j = a2.length;

	while (++i < j) {
	a1[a1.length] = a2[i];
	}
	}
	function arrayPush$$(a1, a2)
	{
	for (var i = 0, j = a2.length; i < j; ++i) {
	a1[a1.length] = a2[i];
	}
	}
	function createRandomArray(n)
	{
	var a = [], i = -1;
	while (++i < n) {
	a[i] = Math.floor(Math.random() * (n + 1));
	}
	return a;
	}

	var a1,a2,a3;

	a2 = createRandomArray(20);
	a3 = createRandomArray(100);
	};


	suite.add("a1 = a3.slice();", function () {
	a1 = a3.slice();
	arrayPush$(a1, a2);
	});

	suite.add("a1 = a3.slice();", function () {
	a1 = a3.slice();
	a1.push(...a2);
	});

	suite.add("a1 = a3.slice();", function () {
	a1 = a3.slice();
	a1 = a1.concat(a2);// ++=
	});

	suite.add("a1 = a3.slice();", function () {
	a1 = a3.slice();
	arrayPush$$(a1, a2);
	});

	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("+++ operator #jsbench #jsperf");
	console.log(new Array(30).join("-"));
	suite.run();
	});