package main

import (

    "log"

    "time"

)

func f() {

    defer timeoutCheck("f slow", time.Now())

    time.Sleep(time.Second)

}

func timeoutCheck(tag string, start time.Time) {

    dis := time.Since(start).Seconds()

    if dis > 1 {

        log.Println(tag, dis, "s")

    }

}

func main() {

    f()

}