If we're just complaining about performance and third-party libraries are an in-scope solution, I don't see why anyone would settle for std::unordered_map. It trails on every hashmap benchmark. Chandler Carruth blames it on the C++ standard, which mandates chaining for collision handling.

I mean, I wouldn't complain if with C++23 we introduce std2 and make things better. While we're at it, we could also try to fix std::list and std::deque which are nearly useless too.