remove dead packages even if no new messages exist

packet-queue.go

@@ -43,14 +43,18 @@ func NewPacketQueue(connection net.Conn) *PacketQueue {
 
 			queue.mu.Lock()
 			now := time.Now().Add(-time.Millisecond * 500)
+			keepIndex := -1
 			for i, packet := range queue.Packets {
 				if packet.Added.After(now) {
-					stillInQueue := queue.Packets[i:]
-					log.Printf("DEBUG: Requeueing %d packets\n", len(stillInQueue))
-					queue.Packets = stillInQueue
+					keepIndex = i
 					break
 				}
 			}
+			if keepIndex == -1 {
+				queue.Packets = queue.Packets[:0]
+			} else {
+				queue.Packets = queue.Packets[keepIndex:]
+			}
 			queue.Packets = append(queue.Packets, PacketWithData{
 				MessageType: messageType,
 				Added:       ts,