A "not an answer" flag was raised against this answer. As you can see, it is not actually providing any new solutions, just comparing the ones already provided by other answers and showing which one is faster.
On the one hand, it is not an answer. It is not attempting to solve the issue. It is, however, providing useful information that can help users choose between the proposed methods.
Personally, I lean towards allowing that type of post. I have to, I have been guilty of posting such myself. In my own answer, I simply collected all posted solutions and compared them in terms of speed. That answer has received 9 upvotes to date and no downvotes, which (might) suggest that the community feels that such comparisons are useful.
So, how so we feel about comparative answers? Answers that provide no new method of solving the OP's issue but do provide useful information about the existing answers. Do we like them? Do we not? Should they be deleted? Or do we feel that they add useful information and can be tolerated?