Object.keys vs hasOwnProperty (v15)

Revision 15 of this benchmark created by Cole on

Setup

var i;
    var key;
    var keys;
    var l;
    var value;
    var hasOwnProperty = {}.hasOwnProperty;
    var obj = {
      'a': 1,
      'b': 2,
      'c': 3,
      'd': 4,
      'e': 5,
      'f': 6,
      'g': 7,
      'h': 8,
      'i': 9,
      'j': 10
    };

Test runner

Ready to run.

Testing in
TestOps/sec
hasOwnProperty
for (key in obj) {
  if (hasOwnProperty.call(obj, key)) {
    value = obj[key];
  }
}
ready
Object.keys
keys = Object.keys(obj);
for (i = 0, l = keys.length; i < l; i++) {
  value = obj[keys[i]];
}
ready
Object.keys with forEach
keys = Object.keys(obj).forEach(function(key) {
  value = obj[key];
});
ready
hasOwnProperty not call
for (key in obj) {
  if (obj.hasOwnProperty(key)) {
    value = obj[key];
  }
}
ready
No check
for (key in obj) {
  value = obj[key];
}
ready

Revisions

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