Closure vs. property

JavaScript performance comparison

Revision 9 of this test case created by Jacob Chapel

Info

Add the constructor call to the test to see how that affects performance, since a lot of constructors are called every time they are used versus once for every action.

Preparation code

<script>
function ClosureColor(name) {
    // Have no choice but to add these methods to the instance
    this.getName = function () {
        return name;
    };
    this.setName = function (n) {
        name = n;
    };
}


function ClosureReturnColor(name) {
    // Return object instead of attaching to Function
    return {
      getName: function () {
        return name;
      },
      setName: function (n) {
        name = n;
      }
    }
}

function PropertyColor(name) {
    this._name = name;
    this.getName = function () {
        return this._name;
    };
    this.setName = function (n) {
        this._name = n;
    };
}



function PrototypeColor(name) {
    this._name = name;
}
PrototypeColor.prototype.getName = function () {
    return this._name;
};
PrototypeColor.prototype.setName = function (n) {
    this._name = n;
};


function GetterSetterColor(name){
    var value = name;
   
    this.__defineGetter__("name", function(){
        return value;
    });
   
    this.__defineSetter__("name", function(val){
        value = val;
    });
}

function ProtoGetterSetterColor(name){
    this._name = name;
}

ProtoGetterSetterColor.prototype = {
  get name() {
    return this._name;
  },
  set name(name) {
    return this._name = name;
  }
}

</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Closure
var closureColor = new ClosureColor('green');
var name = closureColor.getName();
closureColor.setName('blue');
pending…
Property
var propertyColor = new PropertyColor('green');
var name = propertyColor.getName();
propertyColor.setName('blue');
pending…
Prototype
var prototypeColor = new PrototypeColor('green');
var name = prototypeColor.getName();
prototypeColor.setName('blue');
pending…
Closure Return
var closureReturnColor = new ClosureReturnColor('green');
var name = closureReturnColor.getName();
closureReturnColor.setName('blue');
pending…
Getter Setter
var getterSetter = new GetterSetterColor('green');
var name = getterSetter.name;
getterSetter.name = 'blue';
pending…
Prototype Getter Setter
var protoGetterSetter = new ProtoGetterSetterColor('green');
var name = protoGetterSetter.name;
protoGetterSetter.name = 'blue';
pending…

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Revisions

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