array.length vs. cached (v23)

Revision 23 of this benchmark created by yarikos on

Description

added several length of array

Setup

var smallArr = lengthenArray(10);
    bigArr = lengthenArray(1000);
    
    function lengthenArray(source, times) {
      var arr = [];
      for (var i = 0; i < times; i++) {
        arr.push(i);
      }
      return arr;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
small not-cached
(function (a) {
  var sum = 0;
  for (var i = 0; i < a.length; ++i) {
    sum += a[i];
  }
  return sum;
})(smallArr)
ready
small cached
(function (a) {
  var sum = 0;
  for (var i = 0, aLen = a.length; i < aLen; ++i) {
    sum += a[i];
  }
  return sum;
})(smallArr)
 
ready
big not-cached
(function (a) {
  var sum = 0;
  for (var i = 0; i < a.length; ++i) {
    sum += a[i];
  }
  return sum;
})(bigArr)
ready
big cached
(function (a) {
  var sum = 0;
  for (var i = 0, aLen = a.length; i < aLen; ++i) {
    sum += a[i];
  }
  return sum;
})(bigArr)
 
ready

Revisions

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