NewFastHTTPHandlerFunc wraps net/http handler func 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 https://github.com/valyala/fasthttp#switching-from-nethttp-to-fasthttp .