var Class = { create: function() { return function() { //vararg this.initialize.apply(this, arguments); } } }; Color = Class.create(); Color.prototype = { red: 0, green: 0, blue: 0, initialize: function(r,g,b) { this.red = r; this.green = g; this.blue = b; } } function bench(x) { var d = new Date; var colors = new Array(16); for (var i=0;i<1e8;i++) { colors[i&0xf] = (new Color(1,2,3)); } print(new Date - d); return colors; } bench(17); print("Swapping out call"); Function.prototype.call = function() { throw "This should not happen, apply should be called instead"; }; bench(17); print("All done!");