Faster implementation with binary websocket

Client/WebUI/udpclient.go

@@ -10,6 +10,7 @@ const (
 	silenceTimeout = 5 * time.Second
 	reconnectDelay = 2 * time.Second
 	readBufSize    = 65536
+	udpRcvBufSize  = 8 * 1024 * 1024 // 8 MB OS receive buffer — absorbs bursts at high data rates
 )
 
 // UDPClient manages the UDP connection to one MARTe2 streamer source.
@@ -71,6 +72,11 @@ func (u *UDPClient) runSession() error {
 	}
 	defer conn.Close()
 
+	// Increase OS receive buffer to reduce kernel-level packet drops at high data rates.
+	if err := conn.SetReadBuffer(udpRcvBufSize); err != nil {
+		log.Printf("[%s] udp: SetReadBuffer: %v (proceeding with OS default)", u.sourceID, err)
+	}
+
 	serverAddr, err := net.ResolveUDPAddr("udp4", u.serverAddr)
 	if err != nil {
 		return err