Question: I am creating a resumé. I want to know whether mentioning stackoverflow profile counts for much in terms of interview factors, e.g. showing my knowledgeability and performance.

Answer: 
It entirely depends on the person who is going to interview you, I guess. And of course, what your profile looks like. In general, Stack Overflow has become a very well-known resource over the past years - especially in the US, there is a good chance your interviewer knows the site.

If you are referring to your [current Stack Overflow profile](https://stackoverflow.com/users/1053416/yellow-page), I'd say it won't impress a recruiter much in it current state - it contains 4 questions, one of them downvoted, and only one answer that, while probably helpful, doesn't help prove that you are a knowledgeable person.
Currently the answer is No, as Pekka [already said](https://meta.stackexchange.com/a/120941/152859).

However, if and when you will gain enough reputation you will be invited to create a professional profile [here](http://careers.stackoverflow.com/). ( Stack Overflow Careers site)

This can be introduced in job interviews and will even help you find jobs, pretty similar to LinkedIn.