func doTask() {
 //耗時炒作(模擬)
 time.Sleep(200 * time.Millisecond)
 wg.Done()
}

//這里模擬的http接口,每次請求抽象為一個job
func handle() {
 //wg.Add(1)
 job := Job{}
 JobQueue <- job
}

var (
 MaxWorker = 1000
 MaxQueue = 200000
 wg  sync.WaitGroup
)

type Worker struct {
 quit chan bool
}

func NewWorker() Worker {
 return Worker{
  quit: make(chan bool)}
}

// Start method starts the run loop for the worker, listening for a quit channel in
// case we need to stop it
func (w Worker) Start() {
 go func() {
  for {
   select {
   case <-JobQueue:
    // we have received a work request.
    doTask()
   case <-w.quit:
    // we have received a signal to stop
    return
   }
  }
 }()
}

// Stop signals the worker to stop listening for work requests.
func (w Worker) Stop() {
 go func() {
  w.quit <- true
 }()
}

type Job struct {
}

var JobQueue chan Job = make(chan Job, MaxQueue)

type Dispatcher struct {
}

func NewDispatcher() *Dispatcher {
 return &Dispatcher{}
}

func (d *Dispatcher) Run() {
 // starting n number of workers
 for i := 0; i < MaxWorker; i++ {
  worker := NewWorker()
  worker.Start()
 }
}

func Benchmark_handle(b *testing.B) {
 runtime.GOMAXPROCS(runtime.NumCPU())
 d := NewDispatcher()
 d.Run()
 for i:=0;i<10000;i++ {
  wg.Add(1)
  handle()
 }
 wg.Wait()
}

pkg: golang-study-demo/goroutine
1 2029931652 ns/op
PASS