> For example, the AWS C++ SDK uses virtual functions for everything. When you subclass their classes, marking your classes as final allows the compiler to devi

> For example, the AWS C++ SDK uses virtual functions for everything. When you subclass their classes, marking your classes as final allows the compiler to devirtualize your own calls to your own functions (GCC does this reliably). I want to ask, and I sincerely mean no snark, what is the point? When working with AWS through an SDK your code will spend most of the time waiting on network calls. What is the point of devirtualizing your function calls to save an indirection when you will be spending several orders of magnitude more time just waiting for the RPC to resolve? It just doesn't seem like something even worth thinking about at all.