first-pass

JavaScript performance comparison

Revision 2 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.2/underscore-min.js"></script>
<table id="test_table">
  <tbody id="test_tbody">
    Test
  </tbody>
</table>
<style>
  .active{ background:red; font-size:30px; }
</style>
<script type="text/template" id="template">
<% for(var i = 0; i < rows; i++){ %>
    <tr>
    <% for(var j = 0; j < data.length; j++){ %>
         <td><%= data[j] %></td>
    <% } %>
    </tr>
<% } %>
</script>
      
<script>
Benchmark.prototype.setup = function() {
  // 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 = $('<tr></tr>');
                  for (var j = 0; j < this.data.length; j++) {
                      $tr.append('<td>' + this.data[j]["id"] + '</td>');
                  }
                  $tr.appendTo($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
  function moduleE () {};
  
  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
  function moduleF () {};
  
  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();

};

Benchmark.prototype.teardown = function() {
  rows = null;
  dataArray = null;
  dataArrayObject = null;
  predefinedLengthArray = null;
  
  $tbody.empty();
  
  tbody = null;
  $tbody = null;
  
  tr = null;
  td = null;
  $tr = null;
  $td = null;
  frag = null;
  frag2 = null;
  moduleA = null;
  moduleB = null;
  moduleC = null;
  moduleD = null;
  moduleE = null;
  moduleF = null;
  moduleG = null;
  modE = null;
  modF = null;
  modG = null;
  
  // Remove all event handlers for these
  $("table td").off("click", "**");

};
</script>

Preparation code output

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.2/underscore-min.js"></script> <table id="test_table"> <tbody id="test_tbody"> Test </tbody> </table> <style> .active{ background:red; font-size:30px; } </style> <script type="text/template" id="template"> <% for(var i = 0; i < rows; i++){ %> <tr> <% for(var j = 0; j < data.length; j++){ %> <td><%= data[j] %></td> <% } %> </tr> <% } %> </script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Module A
// Module A - no event delegation, array objects, jQuery for table creation
moduleA.init();
pending…
Module B
// Module B - no event delegation, simple arrays, jQuery for table creation
moduleB.init();
pending…
Module C
// Module C - event delegation, simple arrays, jQuery for table creation
moduleC.init();
pending…
Module D
// Module D - event delegation, simple arrays, documentFragment for table creation
moduleD.init();
pending…
Module E
// Simple array, delegation, documentFragment, prototypes
modE.init();
pending…

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