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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)

// Tables
var numItems = 200; // items/cols
var rows = 200;
var tbody = document.getElementById('test_tbody');
var $tbody = $('#test_tbody');
var tr, td;
var $tr, $td;

// Data arrays
var dataArray = [];
var dataArrayObject = [];

// Fragments
var frag = document.createDocumentFragment();
var frag2 = document.createDocumentFragment();

// Populate data
for (var i = 0; i < numItems; i++) {
    dataArray[i] = i;
}

for (var i = 0; i < numItems; i++) {
    dataArrayObject[i] = {};
    dataArrayObject[i]["id"] = i;
}

var predefinedLengthArray = new Array(50);
for (i = 0; i < numItems; i++) {
    predefinedLengthArray[i] = dataArray[i];
}

function drawDocumentFragTable(cols) {
    for (var i = 0; i < rows; i++) {
        tr = document.createElement('tr');
        for (var j = 0; j < cols.length; j++) {
            td = document.createElement('td');
            td.appendChild(document.createTextNode(cols[j]));

frag2.appendChild(td);
        }
        tr.appendChild(frag2);
        frag.appendChild(tr);
    }
    tbody.appendChild(frag);
}

function eventsNoDelegation() {
    $('table td').on('click', function () {
        $(this).toggleClass('active');
    });
}

function eventsWithDelegation() {
    $('table').on('click', 'td', function () {
        $(this).toggleClass('active');
    });
}

// Array object, no delegation, jQuery for table creation.
var moduleA = function () {

return {

data: dataArrayObject,

init: function () {
            this.addTable();
            this.addEvents();
        },

addTable: function () {

for (var i = 0; i < rows; i++) {
                $tr = $('<tr></tr>');
                for (var j = 0; j < this.data.length; j++) {
                    $tr.append('<td>' + this.data[j]["id"] + '</td>');
                }
                $tr.appendTo($tbody);
            }

},
        addEvents: function () {
            eventsNoDelegation();
        }

};

}();

// Simple array, no delegation, jQuery for table creation
var moduleB = function () {

return {

data: dataArray,

init: function () {
            this.addTable();
            this.addEvents();
        },
        addTable: function () {
            for (var i = 0; i < rows; i++) {
                $tr = $('<tr></tr>');
                for (var j = 0; j < this.data.length; j++) {
                    $tr.append('<td>' + this.data[j]["id"] + '</td>');
                }
                $tr.appendTo($tbody);
            }
        },
        addEvents: function () {
            eventsNoDelegation();
        }

};

}();

// Simple array, delegation, jQuery for table creation.
var moduleC = function () {

return {

data: dataArray,

init: function () {
            this.addTable();
            this.addEvents();
        },
        addTable: function () {
            for (var i = 0; i < rows; i++) {
                $tr = $(document.createElement('tr'));
                for (var j = 0; j < this.data.length; j++) {
                                 $tr.append($(document.createElement('td')).text(this.data[j]["id"]));
                }
                $tr.appendTo($tbody);
            }
        },
        addEvents: function () {
            eventsWithDelegation();
        }

};

}();

// Simple array, delegation, documentFragment
var moduleD = function () {

return {

data: dataArray,

init: function () {
            this.addTable();
            this.addEvents();
        },
        addTable: function () {
            drawDocumentFragTable(this.data);
        },
        addEvents: function () {
            eventsWithDelegation();
        }

};

}();

// Simple array, delegation, documentFragment, prototypes
moduleE = function () {};

moduleE.prototype.data = dataArray;
moduleE.prototype.init = function () {
    this.addTable();
    this.addEvents();
};

moduleE.prototype.addTable = function () {
    drawDocumentFragTable(this.data);
};

moduleE.prototype.addEvents = function () {
    eventsWithDelegation();
};

var modE = new moduleE();

// Same, but with a predefined length array
moduleF = function () {};

moduleF.prototype.data = predefinedLengthArray;
moduleF.prototype.init = function () {
    this.addTable();
    this.addEvents();
};
moduleF.prototype.addTable = function () {
    drawDocumentFragTable(this.data);
};
moduleF.prototype.addEvents = function () {
    eventsWithDelegation();
};

var modF = new moduleF();

// Same, but with underscore templating
moduleG = function () {};

moduleG.prototype.data = dataArray;
moduleG.prototype.init = function () {
    this.addTable();
    this.addEvents();
};
moduleG.prototype.addTable = function () {
    var template = _.template($('#template').text());
    var html = template({'data' : this.data, 'rows': rows});
    $tbody.append(html);
};
moduleG.prototype.addEvents = function () {
    eventsWithDelegation();
};

var modG = new moduleG();

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

// Module A - no event delegation, array objects, jQuery for table creation
moduleA.init();

Test 2

Title

Async (check if this is an asynchronous test)

Code

// Module B - no event delegation, simple arrays, jQuery for table creation
moduleB.init();

Test 3

Title

Async (check if this is an asynchronous test)

Code

// Module C - event delegation, simple arrays, jQuery for table creation
moduleC.init();

Test 4

Title

Async (check if this is an asynchronous test)

Code

// Module D - event delegation, simple arrays, documentFragment for table creation
moduleD.init();