Editing How to write up to 98% faster JavaScript code.

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Test case details

Title *

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Preparation code

Preparation code HTML (this will be inserted in the <body> of a valid HTML5 document in standards mode) (useful when testing DOM operations or including libraries)

Include JavaScript libraries as follows: <script src="//cdn.ext/library.js"></script>

Define setup for all tests (variables, functions, arrays or other objects that will be used in the tests) (runs before each clocked test loop, outside of the timed code region) (e.g. define local test variables, reset global variables, clear canvas, etc.) (see FAQ)

Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ)

Code snippets to compare

Test 1

Title

Async (check if this is an asynchronous test)

Code

var Library = window.Library = {}; /* window.Library is not mandory */
Library.util = {
 add: function(a, b) {
  return a + b;
 }
};

Library.cool = {
 Class: function(startValue) {
  this.value = startValue;
 }
}

Library.cool.Class.prototype.addToValue = function() {
 var add = Library.util.add;
 return function(value) {
  this.value = add(this.value, value);
 };
}();

var instance = new Library.cool.Class(1);

while (instance.value < 100000) {
 instance.addToValue(1);
}

Test 2

Title

Async (check if this is an asynchronous test)

Code

define('Library.util.add', function() {
 return function(a, b) {
  return a + b;
 }
});

define('Library.cool.Class', ['Library.util.add'], function(add) {

 var Class = function(startValue) {
  this.value = startValue;
 };

 Class.prototype.addToValue = function(value) {
  this.value = add(this.value, value);
 };

 return Class;

});

require(['Library.cool.Class'], function(Class) {
 var instance = new Class(1);

 while (instance.value < 100000) {
  instance.addToValue(1);
 }
});