Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
      var Array = window.Array;
      var push = Array.prototype.push;
      var slice = Array.prototype.slice;
      var unshift = Array.prototype.unshift;
    
      function arraySlice(array) {
        return slice.call(array);
      }
    
      function arrayPush(array) {
        var x = [];
        push.apply(x, array);
        return x;
      }
    
      function arrayUnshift(array) {
        var x = [];
        unshift.apply(x, array);
        return x;
      }
    
      function whileLoop(array) {
        var i = -1,
            l = array.length,
            x = Array(l);
     
        while (++i < l) {
          x[i] = array[i];
        }
        return x;
      }
    
      function byConstructor(array) {
        return Array.apply(null, array);
      }
    
      var largeArray = Array(1001).join("a").split("");
      var mediumArray = Array(101).join("a").split("");
      var smallArray = Array(6).join("a").split("");
  };
</script>

Test runner

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arraySlice(largeArray);
arraySlice(mediumArray);
arraySlice(smallArray);

arrayPush(largeArray);
arrayPush(mediumArray);
arrayPush(smallArray);

arrayUnshift(largeArray);
arrayUnshift(mediumArray);
arrayUnshift(smallArray);

byConstructor(largeArray);
byConstructor(mediumArray);
byConstructor(smallArray);

whileLoop(largeArray);
whileLoop(mediumArray);
whileLoop(smallArray);

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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 21st September 2011
• Revision 2: published on 22nd September 2011
• Revision 3: published on 17th January 2012
• Revision 4: published by tj on 28th January 2012
• Revision 5: published on 28th January 2012
• Revision 6: published on 3rd March 2012
• Revision 7: published by damien maillard on 30th September 2012 and last updated on 6th December 2012
• Revision 8: published by rektide on 1st December 2012
• Revision 9: published on 31st December 2012
• Revision 11: published by Charmander on 13th January 2013
• Revision 14: published on 30th March 2013

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