faster strlen?

Question

Typical strlen() traverse from first character till it finds \\0. This requires you to traverse each and every character. In algorithm sense, its O(N).

Answer 1

You can try to use vectorization. Not sure if compiler will be able perform it, but I did it manually (using intrinsics). But it could help you only for long strings.

Use stl strings, it's more safe and std::string class contains its length.