Released https://github.com/mpenet/appia - 1.0.0-alpha12 - A fast, OpenApi Path-compatible, http router for ring.
It was rewritten to use a prefix-trie and various optimizations. It's still around 250 loc, with no dependencies (other than clojure).
It's now a lot faster: in the same ballpark as reitit using :conflicts nil . appia being slightly slower because it also matches by method, while retaining all of its characteristics such as allowing overlapping routes and sub-segment parameter matching (`/foo-{bar}-{baz}/.../`.