> The fact that the overhead is only 2x for a tight inner loop should be a cause for celebration, not dire warnings. And as the author himself shows, it's very

> The fact that the overhead is only 2x for a tight inner loop should be a cause for celebration, not dire warnings. And as the author himself shows, it's very easy to disable overflow checking on a per-operation basis when you want to. Agreed. This smells like premature optimization... on a problem that can be solved in O(1) time.