Preparation code

<script>
  function t1(len) {
      var arr = new Array(len);
      while (len-- > 0) {
          arr[len] = 0;
      }
  }
  
  function t2(len) {
      var arr = new Array();
      while (len-- > 0) {
          arr[len] = 0;
      }
  }
  
  function t3(len) {
      var arr = new Array(len);
      for (var i = 0; i < len; i++) {
          arr[i] = 0;
      }
  }
  
  function t4(len) {
      var arr = new Array();
      for (var i = 0; i < len; i++) {
          arr[i] = 0;
      }
  }
  
  function t5(len) {
      var arr = new Array(len);
      for (var i = len; i > 0; i--) {
          arr[i] = 0;
      }
  }
  
  function t6(len) {
      var arr = new Array();
      for (var i = len; i > 0; i--) {
          arr[i] = 0;
      }
  }
function push(len)
{
  var zeros = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
  var l   = zeros.length,
    r   = len - l; // remainder
  for (var i=r; i--;) {
    zeros.push(0);
  }
}

</script>
<script>
  Benchmark.prototype.setup = function() {
    var numzeros = 1000;
    // start from (arbitrarily chosen) sixteen zeros
    var zeros = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
  };
</script>

Test runner

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t1(1000);

t2(1000);

t3(1000);

t4(1000);

t5(1000);

t6(1000);

var numzeros = 1000;
zeros = zeros.slice(0);
var l   = zeros.length,
    r   = numzeros - l; // remainder
for (var i=r; i--;) {
  zeros.push(0);
}

push(1000);

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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 by Jonathan Larson on 6th June 2011
• Revision 2: published by Jonathan Larson on 6th June 2011
• Revision 4: published by PlayMyCode on 15th January 2012
• Revision 5: published on 8th April 2012
• Revision 6: published on 9th September 2012
• Revision 8: published by Timo on 16th February 2013
• Revision 9: published by Timo on 16th February 2013
• Revision 10: published by Timo on 16th February 2013
• Revision 11: published on 25th February 2013
• Revision 13: published 2 weeks ago

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