Property Getter / Setter Techniques

JavaScript performance comparison

Revision 107 of this test case created by

Preparation code

<script>
  var obj = {
   prop: 0
  }
  
  var obj1 = {
   _prop: 0,
   getProp: function() {
    return this._prop;
   },
   setProp: function(value) {
    this._prop = value;
   }
  };
  
  var obj2 = {
   _prop: 0,
   get prop() {
    return this._prop;
   },
   set prop(value) {
    this._prop = value;
   },
  };
  
  
  var obj3 = {
   _prop: 0
  }
  
  
  Object.defineProperty(obj3, "prop", {
   get: function() {
    return this._prop;
  
   },
   set: function(val) {
    this._prop = val;
   }
  });
  
  var obj4 = {
   _prop: 0
  }
  
  
  obj4.__defineGetter__("_prop", function() {
   return this._prop;
  });
  
  obj4.__defineSetter__("_prop", function(val) {
   this._prop = val;
  });


  var obj5 = {
   _prop: 0
  }
  
  
  Object.defineProperty(obj5, "prop", {
   enumerable: true,
   configurable: true,
   get: function() {
    return this._prop;
  
   },
   set: function(val) {
    this._prop = val;
   }
  });
</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
straight property
obj.prop = obj.prop + 1
pending…

Revisions

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