Closure vs. property

JavaScript performance comparison

Test case created by Axel Rauschmayer

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  function ClosureColor(name) {
      Object.defineProperties(this, {
          // Have no choice but to add these methods to the instance
          name: {
              get: function () {
                  return name;
              },
              set: function (n) {
                  name = n;
              }
          }
      });
  }
  function PropertyColor(name) {
      this._name = name;
      Object.defineProperties(this, {
          name: {
              get: function () {
                  return this._name;
              },
              set: function (n) {
                  this._name = n;
              }
          }
      });
  }
  
  function PrototypeColor(name) {
      this._name = name;
  }
  PrototypeColor.prototype = {
      get name() {
          return this._name;
      },
      set name(name) {
          this._name = name;
      }
  };
  

        
  };


      
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Closure 
var c = new ClosureColor('green');
var name = c.name;
c.name = 'blue';
 pending…
Property 
var c = new PropertyColor('green');
var name = c.name;
c.name = 'blue';
 pending…
Prototype 
var c = new PrototypeColor('green');
var name = c.name;
c.name = 'blue';
 pending…

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