NewFastHTTPHandler wraps net/http handler to fasthttp request handler, so it can be passed to fasthttp server.

While this function may be used for easy switching from net/http to fasthttp, it has the following drawbacks comparing to using manually written fasthttp request handler:

* A lot of useful functionality provided by fasthttp is missing
  from net/http handler.
* net/http -> fasthttp handler conversion has some overhead,
  so the returned handler will be always slower than manually written
  fasthttp handler.

So it is advisable using this function only for quick net/http -> fasthttp switching. Then manually convert net/http handlers to fasthttp handlers according to .