This is also called a framework:

https://github.com/cloudflare/pingora

Pingora is actually fast and small (it does not require a JS engine). Way faster and smaller than Hono.

If you want something to be really fast: do not use RegExes.

It's similar to the PHP micro-frameworks back in the day, like Silex and Lumen. Those often didn't contain more than a router, middleware, request/response objects, some type utils and a validator.

I thought those were 'batteries included' framework. I can't think of any generally recognized boundaries though