more adequate initial RTT

libi2pd/Streaming.cpp

@@ -537,7 +537,7 @@ namespace stream
 				m_LocalDestination.DeletePacket (sentPacket);
 				acknowledged = true;
 				if (m_WindowSize < MAX_WINDOW_SIZE && !m_IsFirstACK)
-					if (m_RTT < m_LocalDestination.GetRandom () % INITIAL_RTT) // dirty
+					if (m_RTT < m_LocalDestination.GetRandom () % INITIAL_RTO) // dirty
 						m_WindowIncCounter++;
 			}
 			else
@@ -1143,7 +1143,7 @@ namespace stream
 			CancelRemoteLeaseChange ();
 			UpdateCurrentRemoteLease (true);
 		}
-		if (m_RemoteLeaseChangeTime && m_IsRemoteLeaseChangeInProgress && ts > m_RemoteLeaseChangeTime + INITIAL_RTT)
+		if (m_RemoteLeaseChangeTime && m_IsRemoteLeaseChangeInProgress && ts > m_RemoteLeaseChangeTime + INITIAL_RTO)
 		{
 			CancelRemoteLeaseChange ();
 			m_CurrentRemoteLease = m_NextRemoteLease;

libi2pd/Streaming.h

@@ -60,7 +60,7 @@ namespace stream
 	const double SLOWRTT_EWMA_ALPHA = 0.05;
 	const double PREV_SPEED_KEEP_TIME_COEFF = 0.35; // 0.1 - 1 // how long will the window size stay around the previous drop level, less is longer
 	const int MIN_RTO = 20; // in milliseconds
-	const int INITIAL_RTT = 8000; // in milliseconds
+	const int INITIAL_RTT = 1500; // in milliseconds
 	const int INITIAL_RTO = 9000; // in milliseconds
 	const int INITIAL_PACING_TIME = 1000 * INITIAL_RTT / INITIAL_WINDOW_SIZE; // in microseconds
 	const int MIN_SEND_ACK_TIMEOUT = 2; // in milliseconds