diff --git a/demo/taskpool/main.go b/demo/taskpool/main.go
index 9472a16..8b9bf7a 100644
--- a/demo/taskpool/main.go
+++ b/demo/taskpool/main.go
@@ -66,4 +66,7 @@ func taskPool() {
 func main() {
 	taskPool()
 	//originGo()
+	nazalog.Debug("waiting exit.")
+	time.Sleep(1000 * time.Second)
+	//nazalog.Debug("bye.")
 }
diff --git a/pkg/taskpool/pool.go b/pkg/taskpool/pool.go
index bc62d7c..3fdf4aa 100644
--- a/pkg/taskpool/pool.go
+++ b/pkg/taskpool/pool.go
@@ -31,8 +31,11 @@ func (p *pool) Go(task Task) {
 	//	w = e.Value.(*Worker)
 	//	p.idleWorkerList.Remove(e)
 	if len(p.idleWorkerList) != 0 {
-		w = p.idleWorkerList[0]
-		p.idleWorkerList = p.idleWorkerList[1:]
+		//w = p.idleWorkerList[0]
+		//p.idleWorkerList = p.idleWorkerList[1:]
+
+		w = p.idleWorkerList[len(p.idleWorkerList)-1]
+		p.idleWorkerList = p.idleWorkerList[0:len(p.idleWorkerList)-1]
 		atomic.AddInt32(&p.idleWorkerNum, -1)
 		atomic.AddInt32(&p.busyWorkerNum, 1)
 	}