notify mechanism fix for new task added

Author: Ughuuu

queue.go

@@ -26,6 +26,7 @@ type (
 		routineGroup *routineGroup
 		quit         chan struct{}
 		ready        chan struct{}
+		newTaskAdded chan struct{}
 		worker       core.Worker
 		stopOnce     sync.Once
 		stopFlag     int32
@@ -43,6 +44,7 @@ func NewQueue(opts ...Option) (*Queue, error) {
 		routineGroup: newRoutineGroup(),
 		quit:         make(chan struct{}),
 		ready:        make(chan struct{}, 1),
+		newTaskAdded: make(chan struct{}),
 		workerCount:  o.workerCount,
 		logger:       o.logger,
 		worker:       o.worker,
@@ -147,6 +149,7 @@ func (q *Queue) queue(m *job.Message) error {
 	}
 
 	q.metric.IncSubmittedTask()
+	q.newTaskAdded <- struct{}{}
 
 	return nil
 }
@@ -320,8 +323,8 @@ func (q *Queue) start() {
 								close(tasks)
 								return
 							}
-						case <-time.After(time.Second):
-							// sleep 1 second to fetch new task
+						case <-q.newTaskAdded:
+							// New task added
 						}
 					}
 				}