indexOf

JavaScript performance comparison

Revision 4 of this test case created

Preparation code

<script>
  function contains(str, substr) {
   return ('' + str).indexOf(substr) !== -1;
  }
 
 
  function contains2(str, substr) {
   return !~ ('' + str).indexOf(substr);
  }

  function contains3(str, substr) {
   return ('' + str).indexOf(substr) > -1;
  }
</script>

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Testing in unknown unknown
Test Ops/sec
!==
contains('unicorns', 'corn');
pending…
~
contains2('unicorns', 'corn');
pending…
> -1
contains3('unicorns', 'corn');
pending…

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