Info

Testing if access through Array.indexOf or Object's in Operator is faster.

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var arr = [
       'that',
       'is',
       'some',
       'nice',
       'some',
       'test',
       'here',
    ]
    
    var obj = {
       'that' : null,
       'is' : null,
       'some' : null,
       'nice' : null,
       'test' : null,
       'here' : null
    }
  };
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

if (arr.indexOf('that') !== -1) {
  // found
}

if ('that' in obj) {
  // found
}

if (arr.indexOf('here') !== -1) {
  // found
}

if ('here' in obj) {
  // found
}

if (typeof obj['that'] !== "undefined") {
  // found
}

if (typeof obj['here'] !== "undefined") {
  // found
}

if (obj.hasOwnProperty('here')){
  // found
}

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published on 6th January 2013
• Revision 2: published on 6th January 2013
• Revision 3: published on 6th January 2013
• Revision 4: published on 6th January 2013
• Revision 5: published on 29th January 2013
• Revision 6: published on 7th February 2013
• Revision 7: published on 17th February 2013
• Revision 8: published 2 weeks ago
• Revision 9: published 1 week ago
• Revision 10: published 1 week ago

0 comments