Object.create vs Crockford vs Constructor vs Cornford

JavaScript performance comparison

Revision 17 of this test case created by Peter Michaux

Preparation code

<script>
  var sharedPrototype = {
   one: function() {
    return 1;
   },
   two: function() {
    return 2;
   },
   three: function() {
    return 3;
   }
  };
  
  var crockfordCreate = function(proto) {
   var f = function() {};
   f.prototype = proto;
   return new f();
  };
  
  var Constructor = function() {};
  Constructor.prototype = sharedPrototype;
  
  var cornfordCreate = (function() {
   var f = function() {};
   return function(proto) {
    f.prototype = proto;
    return new f();
   };
  })();
</script>

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Testing in unknown unknown
Test Ops/sec
Object.create() 
var i = 100;
while (i--) Object.create(sharedPrototype);
 pending…
Crockford Create
 
var i = 100;
while (i--) crockfordCreate(sharedPrototype);
 pending…
Constructor
 
var i = 100;
while (i--) new Constructor;
 pending…
Proto
 
var i = 100
while (i--) {
 ({
  '__proto__': Constructor
 })
}
 pending…
Cornford Create
 
var i = 100;
while (i--) crockfordCreate(sharedPrototype);
 pending…

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Revisions

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1 comment

Peter Michaux (revision owner) commented : ∞

Version 17 is wrong.

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