Reuse XMLHttpRequest object or create a new one?

Question

I searched stackoverflow but got contradictory answers:

Why should I reuse XmlHttpRequest objects?

Ajax-intensive page: reuse the same XMLHttpRequest object

Answer 1

It is best to use different objects for each XHR you are making. Even if there's a way of doing it, avoid it! There's no problem with creating new object for each request. If you are worried about memory leak or something of that sort, do not worry, they are all properly GC`ed.

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If you have more than one AJAX task on your website, you should create ONE standard function for creating the XMLHttpRequest object, and call this for each AJAX task.

It actually means that you have one function that creates a new object and returns it every time you call it. It something like:

function newXHR(){
    return a new instance of XHR();
}