Fast Array Loops (v196)

Revision 196 of this benchmark created by Chris Barr on

Preparation HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>

Setup

// Populate the base array
      var arr = [];
      for (var i = 0; i < 1000; i++) {
        arr[i] = i;
      }
    
      function someFn(i) {
        return i * 3 * 8;
      }

Test runner

Ready to run.

Testing in
TestOps/sec
Array.ForEach
arr.forEach(someFn);
ready
_.each()
_.each(arr, someFn);
ready
for (1)
for (var i = 0, len = arr.length; i < len; i++) {
  someFn(arr[i]);
}
ready
for (2)
for (var i = 0; i < arr.length; i++) {
  someFn(arr[i]);
}
ready
for (3)
for (var i = arr.length - 1; i >= 0; i--) {
  someFn(arr[i]);
}
ready
for (4)
for (var i = 0, item; item = arr[i]; i++) {
  someFn(item);
}
ready

Revisions

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