public static void estimateKeyDerivationTime() {
   // This is run in the background after startup. If we haven't recorded it before, do a key
   // derivation to see
   // how long it takes. This helps us produce better progress feedback, as on Windows we don't
   // currently have a
   // native Scrypt impl and the Java version is ~3 times slower, plus it depends a lot on CPU
   // speed.
   checkGuiThread();
   estimatedKeyDerivationTime = Main.instance.prefs.getExpectedKeyDerivationTime();
   if (estimatedKeyDerivationTime == null) {
     new Thread(
             () -> {
               log.info("Doing background test key derivation");
               KeyCrypterScrypt scrypt = new KeyCrypterScrypt(SCRYPT_PARAMETERS);
               long start = System.currentTimeMillis();
               scrypt.deriveKey("test password");
               long msec = System.currentTimeMillis() - start;
               log.info("Background test key derivation took {}msec", msec);
               Platform.runLater(
                   () -> {
                     estimatedKeyDerivationTime = Duration.ofMillis(msec);
                     Main.instance.prefs.setExpectedKeyDerivationTime(estimatedKeyDerivationTime);
                   });
             })
         .start();
   }
 }
  private void render() {
    ArrayList<NetworkMessage> messages = networkController.getMessages();

    for (NetworkMessage message : messages) {
      String messageType =
          message.getClass().getName().replace("NetworkMessages.", "").replace("Messages.", "");
      switch (messageType) {
        case "PelletPositionMessage":
          {
            PelletPositionMessage m = (PelletPositionMessage) message;
            Drawable drawable = getCachedDrawable(m.id);
            if (drawable != null) {
              drawable.node.relocate(m.x, m.y);
              drawable.cacheMisses = 0;
            } else {
              Random r = new Random();
              Node node =
                  drawCircle(
                      m.x, m.y, 5, new Color(r.nextFloat(), r.nextFloat(), r.nextFloat(), 1));
              drawableCache.add(new Drawable(m.id, node));
            }
          }
          break;
        case "BlobStateMessage":
          {
            BlobStateMessage m = (BlobStateMessage) message;
            Color color = Color.web(m.color);
            Node node;
            if (color.getBrightness() != 0) {
              node = drawCircle(m.x, m.y, m.size / 2, color);
            } else {
              node = drawCircle(m.x, m.y, m.size / 2, color.brighter().brighter());
            }
            Node nameText =
                drawText((m.x - m.username.length() * 5), (m.y - m.size / 2), m.username, color);
            Drawable drawable = getCachedDrawable(m.id);
            if (drawable != null) {
              node.setLayoutX((drawable.node.getTranslateX() - m.x) / 10000);
              node.setLayoutY((drawable.node.getTranslateY() - m.y) / 10000);
              drawable.node = node;
              drawable.cacheMisses = 0;
              Drawable nameTag = getCachedDrawable(m.id + 9000);
              nameTag.node = nameText;
              nameTag.cacheMisses = 0;
            } else {
              drawableCache.add(new Drawable(m.id, node));
              drawableCache.add(new Drawable(m.id + 9000, nameText));
            }
          }
          break;
        case "PingMessage":
          {
            renderPane.getChildren().clear();
            ArrayList<Drawable> drawables = new ArrayList<>(drawableCache);
            for (Drawable drawable : drawables) {
              if (drawable.cacheMisses > 1) {
                drawableCache.remove(drawable);
              }
              drawable.cacheMisses++;
              renderPane.getChildren().add(drawable.node);
            }
            renderPane.getChildren().addAll(chatBox, chatInput, lagLabel, scores);

            lag = System.currentTimeMillis() - lastReceivedTime;
            lastReceivedTime = System.currentTimeMillis();
            lagLabel.setText("Net Lag: " + Long.toString(lag));
          }
          break;
        case "HighScoreMessage":
          {
            HighScoreMessage m = (HighScoreMessage) message;
            highScores.setText("HIGH SCORES:" + m.text);
          }
          break;
        case "CurrentScoreMessage":
          {
            CurrentScoreMessage m = (CurrentScoreMessage) message;
            currentScores.setText("Current Scores:" + m.text);
          }
          break;
        case "ChatMessage":
          {
            ChatMessage m = (ChatMessage) message;
            chatBox.appendText(m.username + "> " + m.text + "\n");
          }
          break;
      }
    }
  }