diff --git a/pool.go b/pool.go
index dcd71b4..338d94f 100644
--- a/pool.go
+++ b/pool.go
@@ -69,13 +69,12 @@ func (p *Pool) periodicallyPurge() {
 	defer heartbeat.Stop()
 
 	for range heartbeat.C {
+		if CLOSED == atomic.LoadInt32(&p.release) {
+			break
+		}
 		currentTime := time.Now()
 		p.lock.Lock()
 		idleWorkers := p.workers
-		if CLOSED == atomic.LoadInt32(&p.release) {
-			p.lock.Unlock()
-			return
-		}
 		n := -1
 		for i, w := range idleWorkers {
 			if currentTime.Sub(w.recycleTime) <= p.expiryDuration {
diff --git a/pool_func.go b/pool_func.go
index 623c60f..b8ef5ab 100644
--- a/pool_func.go
+++ b/pool_func.go
@@ -72,13 +72,12 @@ func (p *PoolWithFunc) periodicallyPurge() {
 	defer heartbeat.Stop()
 
 	for range heartbeat.C {
+		if CLOSED == atomic.LoadInt32(&p.release) {
+			break
+		}
 		currentTime := time.Now()
 		p.lock.Lock()
 		idleWorkers := p.workers
-		if CLOSED == atomic.LoadInt32(&p.release) {
-			p.lock.Unlock()
-			return
-		}
 		n := -1
 		for i, w := range idleWorkers {
 			if currentTime.Sub(w.recycleTime) <= p.expiryDuration {