[tialaramex]

std::map will be a Red Black Tree, as with most of the other container types this really likes pointer chasing

Unlike in std::unordered_map you are getting some value here, the RB tree is able to achieve meaningful efficiency gains from its use of pointers. The trouble is that your computer isn't a PDP-11, a hybrid which does fewer dereferences but has more locality will trade well here on a real computer built this century.

So, I'm torn, it's not awful but it's a problem that std::map is basically obliged to be a Red Black Tree even though that's not a good fit for today's machines.