JobLeonard/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"/>
	<title>split string into segments: regex vs substr vs split/slice/join (plus plain split for comparison)</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 () {
		var str = 'abcdefghijkl';
		for (var i = 0; i < 8; i++){
		    str += str;
		}

		var rExp = /.{1,3}/g;

		function splitChunks(_str, n){
		    var chunks = [];

		    for (var i = 0, charsLength = _str.length; i < charsLength; i += n) {
		        chunks.push(_str.substring(i, i + n));
		    }
		    return chunks;
		}
	};


	suite.add("comparison to str.split('');", function () {
		// comparison to str.split('');
		var chunks = str.split('');
	});

	suite.add("str.match(/.{1,3}/g);", function () {
		// str.match(/.{1,3}/g);
		var chunks = str.match(/.{1,3}/g);
	});

	suite.add("str.match(rExp); , where rExp = /.{1,3}/g; (perhaps initialising the regex causes overhead)", function () {
		// str.match(rExp); , where rExp = /.{1,3}/g; (perhaps initialising the regex causes overhead)
		var chunks = str.match(rExp);
	});

	suite.add("substring + array push", function () {
		// substring + array push
		var chunks = [];

		for (var i = 0, charsLength = str.length; i < charsLength; i += 3) {
		    chunks.push(str.substring(i, i + 3));
		}
	});

	suite.add("substring + array push as function", function () {
		// substring + array push as function
		chunks = splitChunks(str, 3);
	});

	suite.add("split + slice + join", function () {
		// split + slice + join
		var _chunks = str.split('');
		var chunks = [];

		for (var i = 0, charsLength = str.length; i < charsLength; i += 3) {
		    chunks.push(_chunks.slice(i, i + 3).join(''));
		}
	});

	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("split string into segments: regex vs substr vs split/slice/join (plus plain split for comparison)");
	console.log(new Array(30).join("-"));
	suite.run();
});
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>split string into segments: regex vs substr vs split/slice/join (plus plain split for comparison)</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 () {
	var str = 'abcdefghijkl';
	for (var i = 0; i < 8; i++){
	str += str;
	}

	var rExp = /.{1,3}/g;

	function splitChunks(_str, n){
	var chunks = [];

	for (var i = 0, charsLength = _str.length; i < charsLength; i += n) {
	chunks.push(_str.substring(i, i + n));
	}
	return chunks;
	}
	};


	suite.add("comparison to str.split('');", function () {
	// comparison to str.split('');
	var chunks = str.split('');
	});

	suite.add("str.match(/.{1,3}/g);", function () {
	// str.match(/.{1,3}/g);
	var chunks = str.match(/.{1,3}/g);
	});

	suite.add("str.match(rExp); , where rExp = /.{1,3}/g; (perhaps initialising the regex causes overhead)", function () {
	// str.match(rExp); , where rExp = /.{1,3}/g; (perhaps initialising the regex causes overhead)
	var chunks = str.match(rExp);
	});

	suite.add("substring + array push", function () {
	// substring + array push
	var chunks = [];

	for (var i = 0, charsLength = str.length; i < charsLength; i += 3) {
	chunks.push(str.substring(i, i + 3));
	}
	});

	suite.add("substring + array push as function", function () {
	// substring + array push as function
	chunks = splitChunks(str, 3);
	});

	suite.add("split + slice + join", function () {
	// split + slice + join
	var _chunks = str.split('');
	var chunks = [];

	for (var i = 0, charsLength = str.length; i < charsLength; i += 3) {
	chunks.push(_chunks.slice(i, i + 3).join(''));
	}
	});

	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("split string into segments: regex vs substr vs split/slice/join (plus plain split for comparison)");
	console.log(new Array(30).join("-"));
	suite.run();
	});