Prototype vs Module pattern performance

JavaScript performance comparison

Revision 29 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var methodAccessPerObject = 5;
    var res = 0;
   
    Klass1 = function() { var privateArr = []; }
    Klass1.prototype.foo = function(x) {
      return x + 1;
    }
    Klass1.prototype.bar = function(x) {
      return x + 1;
    }
   
    Klass2 = function() {
      var privateArr = [];
      var foo = function(x) {
            return x + 1;
          },
          bar = function(x) {
            return x + 1;
          };
   
      return {foo: foo, bar: bar}
    }
   
   
    var FooFunction = function(x) {
      return x + 1;
    };
    var BarFunction = function(x) {
      return x + 1;
    };
   
    Klass3 = function() {
      var privateArr = [];
      return {foo: FooFunction, bar: BarFunction}
    }
   
   
    Klass4 = function() {
      var privateArr = [];
      this.foo = FooFunction;
      this.bar = BarFunction;
    }
   
   
    Klass5 = function(){
      var privateArr = [];
      // let's use `bind` to partially apply, to provide
      // access to the private variable. If not this, why else
      // would anyone use the module pattern?
      this.foo = FooFunction.bind(this, privateArr);
      this.bar = BarFunction.bind(this, privateArr);
    }
   
    Klass6 = function() {
      var privateArr = [];
      return {
        foo: FooFunction.bind(this, privateArr),
        bar: BarFunction.bind(this, privateArr)
      }
    }
   
};
</script>

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Testing in unknown unknown
Test Ops/sec
Prototypal
var i = 1000,
    objs = [];
while (i--) {
  var o = new Klass1()
  objs.push(new Klass1());
  var j = methodAccessPerObject;
  while (j--) {
    res += o.foo;
    res += o.bar;
  }
}
pending…
Module pattern
var i = 1000,
    objs = [];
while (i--) {
  var o = Klass2()
  objs.push(Klass2());
  var j = methodAccessPerObject;
  while (j--) {
    res += o.foo;
    res += o.bar;
  }
}
pending…
Module pattern with cached functions
var i = 1000,
    objs = [];
while (i--) {
  var o = Klass3()
  objs.push(Klass3());
  var j = methodAccessPerObject;
  while (j--) {
    res += o.foo;
    res += o.bar;
  }
}
pending…
Prototypal with cached
var i = 1000,
    objs = [];
while (i--) {
  var o = new Klass4()
  objs.push(new Klass4());
  var j = methodAccessPerObject;
  while (j--) {
    res += o.foo;
    res += o.bar;
  }
}
pending…
Prototypal with bound private
var i = 1000,
    objs = [];
while (i--) {
  var o = new Klass5()
  objs.push(new Klass5());
  var j = methodAccessPerObject;
  while (j--) {
    res += o.foo;
    res += o.bar;
  }
}
pending…
Module pattern with cached functions and bound private
var i = 1000,
    objs = [];
while (i--) {
  var o = Klass6()
  objs.push(Klass6());
  var j = methodAccessPerObject;
  while (j--) {
    res += o.foo;
    res += o.bar;
  }
}
pending…

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