.(dot) vs [](square bracket) (v7)

Revision 7 of this benchmark created on November 9, 2011

Preparation HTML

<script>
  var doc = "document";
  
  // setup a tiny object
  var foo = {
   bar: "value"
  };
  var baz = "bar";
  
  // setup a really big object
  var bigObj = {};
  bigObj.one = {};
  bigObj.one.two = {};
  bigObj.one.two.three = {};
  bigObj.one.two.three.four = {};
  for (var i = 0; i < 100000; i++) {
   bigObj.one.two.three.four["prop" + i] = "value" + i;
  }
  
  var bigObjPropName = "prop25";
  var bigObjPropNameRef = bigObj.one.two.three.four.prop25;
</script>

Test runner

var a = window.document;

var a = window["document"];

var a = window[doc];

var a = foo.bar;

var a = foo["bar"];

var a = foo[baz];

var a = bigObj.one.two.three.four.prop25;

var a = bigObj.one.two.three.four[bigObjPropName];

var a = bigObjPropNameRef;

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published by JavaScript Nazi on August 6, 2010
• Revision 2: published by Kyle Simpson on August 7, 2010
• Revision 5: published by Michael Norman on November 19, 2010
• Revision 6: published by blocks-vs-functions on September 3, 2011
• Revision 7: published on November 9, 2011
• Revision 8: published by mah0x211 on February 16, 2012
• Revision 9: published by mah0x211 on February 18, 2012
• Revision 13: published on July 5, 2012
• Revision 15: published on April 17, 2013
• Revision 18: published by foo on February 10, 2015