I'd like to provide format capabilities to my objects, however #include <fmt/format.h> adds .2s - .25s time to every translation unit that includes the resulting header. This doesn't depend on any use of fmt::, it's just the include.

This might not seem like a lot, but can add up to meaningful times in larger projects. This seems like quite a large opportunity-cost just to provide the capability.

As a comparison, #include <iostream> adds a difficult-to-measure 0.02s, and #include <ranges> isn't adding any measurable time on my debian-testing platform.