Preparation code

      
      <script>

        Benchmark.prototype.setup = function() {

          
  let myClassObject;
  let myFuncObject1;
  let myFuncObject2;
  
  // using the `class` keyword
  class MyClassObject {
    constructor(initVal) {
      this.myVal = initVal;
    }
  
    set(x) {
      this.myVal = x;
    }
  }
  
  // using a function with `this`
  const makeObject1 = initVal => {
    return {
      myVal: initVal,
      set: function(x) {
        this.myVal = x;
      },
    };
  };
  
  // using a function without `this`
  const makeObject2 = initVal => {
    let myVal = initVal;
    return {
      get: function() {
        return myVal;
      },
      set: function(val) {
        myVal = val;
      },
    };
  };
        
  };
          



        Benchmark.prototype.teardown = function() {

          
  delete myClassObject;
  delete myFuncObject1;
  delete myFuncObject2;
        
  };

      
</script>
    

Test runner

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myClassObject = new MyClassObject(0)

myFuncObject1 = makeObject1(0)

myFuncObject2 = makeObject2(0)

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