Rewriting in full for the sake of performance gain is indeed a questionable proposal. Rewriting hot spots being the more sensible approach. A better reason fo

Rewriting in full for the sake of performance gain is indeed a questionable proposal. Rewriting hot spots being the more sensible approach. A better reason for rewriting however is to migrate to a more maintainable language with focus on readability from one which focus on expressiveness (and hence favored for rapid development) as the project matures.