Feature(Go): Screen frame relay end-to-end with graceful client BYE (Phase 4)

server/go/connection/context.go

@@ -86,6 +86,15 @@ const (
 // NewContext creates a new connection context
 func NewContext(conn net.Conn, mgr *Manager) *Context {
 	now := time.Now()
+	// Disable Nagle's algorithm. The protocol mixes tiny acks (ConnAuth,
+	// HeartbeatAck, CMD_MASTERSETTING) with large frame bursts; with Nagle
+	// on, those acks sit in the kernel buffer up to ~200 ms waiting for
+	// more bytes, and combined with the peer's delayed-ACK that's enough
+	// to make the screen handshake feel sluggish vs. the C++ server (which
+	// sets TCP_NODELAY on every sub-context in ScreenSpyDlg).
+	if tcp, ok := conn.(*net.TCPConn); ok {
+		_ = tcp.SetNoDelay(true)
+	}
 	ctx := &Context{
 		Conn:           conn,
 		RemoteAddr:     conn.RemoteAddr().String(),