ah, now I remember why I had carried on with the linked list from the old c++ codebase https://gist.github.com/Quinny/09e34afb1d187e43dea2f3c3b0c04b9f#file-lru

ah, now I remember why I had carried on with the linked list from the old c++ codebase https://gist.github.com/Quinny/09e34afb1d187e43dea2f3c3b0c04b9f#file-lru_cache-h-L28 https://gist.github.com/Quinny/09e34afb1d187e43dea2f3c3b0c04... the key refresh in std::list required a copy of the std::pair, where as I wished to keep it as an unlink / relink