array.length in loop

Benchmark created by KooiInc on

Preparation HTML

<script>
  var arr = (function() {
   var i = -1,
       length = 10000,
       ret = Array(length);
   while (++i < length) {
    ret[i] = i;
   }
   return ret;
  })();
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
length in loop
var j = [];
for (var i = 0; i < arr.length; i++) {
 j[i] = arr[i];
}
ready
length as variable
var j = [], len = arr.length;
for (var i = 0; i < len; i++) {
 j[i] = arr[i];
}
ready

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