perf: the browser terminal's WebSocket deflates larger messages

internal/server/handlers_panel_term.go

@@ -136,7 +136,9 @@ func (s *Server) handlePanelTermWS(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "closed", http.StatusGone)
 		return
 	}
-	conn, err := websocket.Accept(w, r, &websocket.AcceptOptions{CompressionMode: websocket.CompressionDisabled})
+	// Terminal text packs well: deflate with the context kept between
+	// messages, for the larger ones (screens of output, not keystrokes).
+	conn, err := websocket.Accept(w, r, &websocket.AcceptOptions{CompressionMode: websocket.CompressionContextTakeover, CompressionThreshold: 256})
 	if err != nil {
 		return
 	}