Is there much difference between Lion and the router in Gin (https://github.com/gin-gonic/gin)?
Gin uses HttpRouter (https://github.com/julienschmidt/httprouter) which is heavily optimized for performance, as can seen here: https://github.com/julienschmidt/go-http-routing-benchmark. As the author has noted on the page that "a comparison with other frameworks is coming soon" personally I would play safe and stick with HttpRouter for now and if it makes sense rewrite routing and switch to Lion once the performance characteristics are available.

(Or maybe the author, also the OP, could join and tell how Lion compares to HttpRouter)