contains() vs indexOf

JavaScript performance comparison

Revision 13 of this test case created by ES

Preparation code

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>

      
<script>
Benchmark.prototype.setup = function() {
  'use strict';
  
  if (!String.prototype.contains) {
    String.prototype.contains = function(searchString) {
      return this.indexOf(searchString) !== -1;
    };
  }
  
  var string = 'foobarfoobar';

};
</script>

Preparation code output

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
contains
string.contains('rf');
pending…
+ 1
string.indexOf('rf') + 1;
pending…
> -1
string.indexOf('rf') > -1;
pending…
LoDash
_.contains(string, 'rf');
pending…
~string.indexOf
~
string.indexOf('rf');
pending…
!==
string.indexOf('rf') !== -1;
pending…
>= 0
string.indexOf('rf') >= 0;
pending…
indexOf
string.indexOf('rf') != -1;
pending…

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