array vs object (v19)

Revision 19 of this benchmark created on

Setup

var arr = [],
      i,
      obj = {};
    for (i = 0; i < 100; i = i + 1) {
      var item = {
        index: i
      };
      arr.push(item);
      obj[i] = item;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
array
var myLength = arr.length;
for (var x = 0; x < myLength; x++) {
  i = arr[x].index;
}
ready
array
for (var x = 0; x < arr.length; x++) {
  i = arr[x].index
}
ready
object unknown length
var keys = Object.keys(obj);
for (var x = 0; x < keys.length; x++) {
  i = obj[keys[x]].index;
}
ready

Revisions

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