Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function contains1( str, substr ) {
            return !!~('' + str).indexOf(substr);
    }
    
    function contains2( str, substr ) {
            return ('' + str).indexOf(substr)>-1;
    }
    
    function contains3( str, substr ) {
            return ('' + str).indexOf(substr)+1;
    }
  };
</script>

Test runner

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contains1('abc','a');
contains1('abc','d');

contains2('abc','a');
contains2('abc','d');

contains3('abc','a');
contains3('abc','d');

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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 12th December 2012
• Revision 2: published on 27th December 2012

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