This is an example of how to serve both a normal collection of routes and net/http/pprof on distinct addr:port in golang

doubleserve.go

package main

import (
        jsonh "bitbucket.org/smcquay/json"
        "encoding/json"
        "fmt"
        "log"
        "net/http"
        _ "net/http/pprof"
)

func hi(w http.ResponseWriter, r *http.Request) {
        b, err := json.Marshal(r)
        if err != nil {
                log.Fatal(err)
        }
        fmt.Fprintf(w, string(b))
}

func main() {
        go func() {
                log.Println(http.ListenAndServe("localhost:8667", nil))
        }()

        sm := http.NewServeMux()
        sm.Handle("/", jsonh.Handler(hi))

        log.Println(http.ListenAndServe(":8666", sm))
}