util::constexpr_ contains helper functions for the openage logger that should be evaluated at compile-time. However, at least for me, these functions were still evaluated at runtime instead. This created a lot of unnecessary call to these functions, especially strip_prefix, when logging messages. The log messages take up a giant amount of resources in the event loop for example, due to the frequent calls to the logger.

Since C++20 can enforce compile-time evaluation with the consteval keyword, so I replaced all constexpr specifiers in the namespace with that. I also changed the name of the namespace to util::consteval_ to make this change more clear.