Add support for fasthttp

[go-chi]

Add support for fasthttp

[VojtechVitek]

@hmgle thanks for the investigation and really interesting benchmarks!

I think having fork for fasthttp would be the best option here right now, though.

We're really excited about Go 1.7's built-in context, which will allow us to simplify chi, remove interface{} args and use the standard http.Handler signatures:

func Handler(w http.ResponseWriter, r *http.Request) {
   user, ok := r.Context().Value("user")
   // do something
})

Please, check out https://github.com/pressly/chi/tree/v2 branch.

---

If we were to support fasthttp and its custom signatures func(ctx context.Context, fctx *fasthttp.RequestCtx), we'd have to maintain a lot more again.

Fasthttp seems to be really fast, but I wonder about missing HTTP 2 support and Go 1.7's request context.

We may have fasthttp as a chi subpkg one day. But I doubt it could happen anytime soon because of maintainability issues.

import "github.com/pressly/chi/fasthttp

func main() {
  r := chi.NewRouter()

  r.Get("/", func(ctx context.Context, fctx *fasthttp.RequestCtx) {
    w.Write([]byte("hi"))
  })

  http.ListenAndServe(":3333", r)
}

[hmgle]

@VojtechVitek I agree.
Fasthttp had the advantage of a good performance, but at the same time it is incompatible with net/http. It would not benefit from net/http standardization.