Property detection (v5)

Revision 5 of this benchmark created by Tom on

Description

These test if a property exists in an object. The boolean syntax is often used, but can lead to wrong results (a property with a value of false wouldn't be detected, for example).

Preparation HTML

<script>
  var obj = {
    a: 1
  };
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
in operator
if ('a' in obj) {}
if ('b' in obj) {}
ready
boolean value
if (obj.a) {}
if (obj.b) {}
ready
hasOwnProperty
if (obj.hasOwnProperty('a')) {}
if (obj.hasOwnProperty('b')) {}
ready
boolean value 2
if (obj['a']) {}
if (obj['b']) {}
ready

Revisions

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