I like the idea of delegating logging to its own process in theory (in practice, it would depend on your configuration, I guess, it may mean a lot of context sw

I like the idea of delegating logging to its own process in theory (in practice, it would depend on your configuration, I guess, it may mean a lot of context switching), but your built-in coroutines seem to rely on yield instead. Have you experimented with all three styles? A big feature missing, IMHO, is file-based configuration. You definitely want this for larger projects.