Info

Testing speed between array index searching and variable reference.

Data set contains 5000 elements.

Test performs 200 operations with a single index

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var data = [];
    var x = new Date();
    
    for (var i = 0; i < 5000; i++) {
      data.push(x.getTime());
    }
  };

  Benchmark.prototype.teardown = function() {
    var data = null;
  };
</script>

Test runner

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for (var i = 0; i < 200; i++) {
  // get data at index
  var x = data[300];
}

var x = data[300];

for (var i = 0; i < 200; i++) {
  // get data from reference
  var y = x;
}

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