Property Getter / Setter Techniques

JavaScript performance comparison

Revision 81 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;
  });
function goo(){
  var o = {prop:1};
  
  return {
    props:o,
    get: function(key){
      return o[key];
    }
  }
}
obj5 = goo();

function goo2(){
  var o = {prop:1};
  
  return {
    props:o,
    get: function(key){
      return this.props[key];
    }
  }
}
obj6 = goo2();
</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Methods
obj1.setProp(obj1.getProp() + 1);
pending…
get / set
obj2.prop = obj2.prop + 1;
pending…
Object.defineProperty
obj3.prop = obj3.prop + 1;
pending…
__defineGetter__
obj4.prop = obj4.prop + 1;
pending…
Property
obj._prop = obj._prop + 1;
pending…
plain
obj5.props.prop = obj5.get('prop')+1;
pending…
plain this
obj6.props.prop = obj6.get('prop')+1;
pending…

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