Superman vs. Cthulhu: Who would win?

In truth. I doubt Superman could really do all he did in the 1978 Christopher Reeve movie—not that he lacks strength or power but is physically too small to be in all the necessary places at once.

But then again, we do see superheroes putting whole planets back together in some comics—never mind the fact that superman lost a prize fight to Mohammad Ali back in a 1976 comic book

But what if we pit Superman, or any other superhero, against Great Cthulhu or any other superheroes against the cosmic horrors of the Great Old Ones. I know the Great Old Ones cannot die or be destroyed but could they at least be stopped or imprisoned a few more aeons?

Anyone may answer of course— but it will help the discussion if you are familiar with the very strange writings of H.P. Lovecraft and his ilk. or played the role-playing games by Chaosium.