Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function Foo( name, a, b ) {
        this.name = name;
        this.a = a;
        this.b = b;
        this.c = a + b;
    }
    
    Foo.prototype.sum = function() {
        return this.a + this.b + this.c;
    }
    
    function newFoo( name, a, b ) {
        return [ 0, name, a, b, a+b ];
    }
    
    
    function fooSum( fooArr ) {
        return fooArr[1] + fooArr[2] + fooArr[3];
    }
    
    function newFooLit( name, a, b ) {
        return {
            _ : 0,
            name: name,
            a: a,
            b: b,
            c: a+b
        }
    }
    
    function fooSumLit( fooLit ) {
        if ( fooLit._ === 0 ) {
            return fooLit.a + fooLit.b + fooLit.c;
        }
    }
    
    var fooObj = new Foo( 'john', 2, 4 );
    var fooArr =  newFoo( 'john', 2, 4 );
    var fooLit =  newFooLit( 'john', 2, 4 );
    
  };
</script>

Test runner

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var f1 = new Foo("john", 2, 4);

var f2 = newFoo( "john", 2, 4 );

var f3 = newFooLit( 'john', 2, 4 );

var c1 = fooObj.sum();

var c2 = fooSum( fooArr );

var c3 = fooSumLit( fooLit );

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