bench.js

function Point(x, y) {
    this.x = x;
    this.y = y;
}
 
Point.prototype.getSum = function() {
    return this.x + this.y;
};

function functionOne(a, b, c, d) {
   return {
   	x: a.x + b.x + c.x + d.x,
   	y: a.y + b.y + c.y + d.y
   };
};

function functionTwo(ax, bx, cx, dx, ay, by, cy, dy, resultObject) {
  resultObject.x = ax + bx + cx +dx;
  resultObject.y = ay + by + cy +dy;
  return resultObject;
};

function functionThree(ax, bx, cx, dx, ay, by, cy, dy) {
   return new Point(ax + bx + cx + dx, ay + by + cy + dy);
};

var iterations = 10000000;

console.time('Function Object creation #1');
for(var i = 0; i < iterations; i++ ){
	
	var a = { x: Math.random(), y: Math.random() };
    var b = { x: Math.random(), y: Math.random() };
   	var c = { x: Math.random(), y: Math.random() };
   	var d = { x: Math.random(), y: Math.random() };

    var result = functionOne(a, b, c, d);
};
console.timeEnd('Function Object creation #1')


console.time('Function re-used obejct result #2');

var resultObject = { x: null, y: null };
for(var i = 0; i < iterations; i++ ){
	
	var ax = Math.random();
	var bx = Math.random();
	var cx = Math.random();
	var dx = Math.random();
	var ay = Math.random();
	var by = Math.random();
	var cy = Math.random();
	var dy = Math.random();

    var result = functionTwo(ax, bx, cx, dx, ay, by, cy, dy, resultObject);
};
console.timeEnd('Function re-used obejct result #2')

console.time('Function new Point creation #3');
for(var i = 0; i < iterations; i++ ){
  
  var ax = Math.random();
  var bx = Math.random();
  var cx = Math.random();
  var dx = Math.random();
  var ay = Math.random();
  var by = Math.random();
  var cy = Math.random();
  var dy = Math.random();

  var result = functionThree(ax, bx, cx, dx, ay, by, cy, dy);
};
console.timeEnd('Function new Point creation #3');