Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    
    function OBJ_1( obj ){ 
        return obj.x; 
    }
    
    obj1 = { 
        x: 10 
    }
    
    function OBJ_2(){}
    
    OBJ_2.prototype.getX = function(){ 
        return this.x; 
    }
    
    obj2 = new OBJ_2();
    sum = 0;
  };
</script>

Test runner

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sum += OBJ_1( obj1 );

sum += obj2.getX();
    

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