Prototype vs Module pattern performance

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Prototypal
Klass = function() {
}
Klass.prototype.foo = function() {
    alert('foo');
}
Klass.prototype.bar = function() {
    alert('bar');
}

var i = 1000, objs = [];
while(i--) {
    objs.push(new Klass());
}
ready
Module pattern
Klass = function() {
    var foo = function() {
        alert('foo');
    }, bar = function() {
        alert('bar');
    };

    return {foo: foo, bar: bar}
}

var i = 1000, objs = [];
while(i--) {
    objs.push(new Klass());
}
ready

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