Object.keys vs _,keys vs hasOwnProperty (v47)

Revision 47 of this benchmark created by Greg on

Preparation HTML

<script src="http://underscorejs.org/underscore-min.js"></script>

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( !obj.hasOwnProperty( key ) ) { continue }
  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
_.keys
keys = _.keys(obj);
for (i = 0, l = keys.length; i < l; i++) {
  value = obj[keys[i]];
}
ready

Revisions

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