Sleep server, connects, but takes ages to respond

sleep_server.go

package main

import(
	"fmt"
	"net/http"
	"log"
	"time"
	"flag"
)


func main() {

	var timeout = flag.Int("timeout", 60, "how many seconds to sleep")
	flag.Parse()

	sleepDuration := time.Duration(*timeout) * time.Second

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		log.Printf("connected, will sleep for %s seconds\n", sleepDuration)
		time.Sleep(sleepDuration)
		fmt.Fprint(w, "Hello, i am very very slow")
		log.Printf("responded\n")
	})
	log.Fatal(http.ListenAndServe(":8080", nil))
}