When declaring an enum, should you force the type to byte for under 256 entities?

Question

If you have an enum in your application and you only have a few items, should you force the underlying type to be the smallest possible type?

    enum smaller : byte     {         one,         two,         three     }; 

Answer 1

No. Don't prematurely optimize unless you've proved with a profiler that it's actually a problem.