Array.indexOf vs Object's "in operator

JavaScript performance comparison

Revision 5 of this test case created by

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>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Array - Find first element
if (arr.indexOf('that') !== -1) {
  // found
}
pending…
Array - Find first element w/obj
if (typeof obj['that'] !== "undefined") {
  if (arr.indexOf('that') !== -1) {
    // found
  }
}
pending…
Array - Find none element
if (arr.indexOf('abcd') !== -1) {
  // found
}
pending…
Array - Find none element w/obj
if (typeof obj['abcd'] !== "undefined") {
  if (arr.indexOf('abcd') !== -1) {
    // found
  }
}
pending…

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Revisions

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