Is there a performance difference in using a tuple over a frozenset as a key for a dictionary?
<p>I have a script that makes many calls to a dictionary using a key consisting of two variables. I know that my program will encounter the two variables again in the reverse order which makes storing the key as a tuple feasible. (Creating a matrix with the same labels for rows and columns)</p>

<p>Therefore, I was wondering if there was a performance difference in using a tuple over a frozenset for a dictionary key.</p>
