JavaFX2 - very poor performance when adding custom made (fxml)panels to gridpane dynamically

Question

Problem I want to add custom made panels, built via javafx scene builder, to a gridpane at runtime. My custom made panel exsits of buttons, labels and so on

Answer 1

I have had a similar issue. I also had to load a custom fxml-based component several times, dynamically, and it was taking too long. The FXMLLoader.load method call was expensive, in my case.

My approach was to parallelize the component instantiation and it solved the problem.

Considering the example posted on the question, the controller method with multithread approach would be:

private void textChange(KeyEvent event) {
    GridPane g = new GridPane();
    // creates a thread pool with 10 threads
    ExecutorService threadPool = Executors.newFixedThreadPool(10); 
    final List listOfComponents = Collections.synchronizedList(new ArrayList(100));

    for (int i = 0; i < 100; i++) {
        // parallelizes component loading
        threadPool.execute(new Runnable() {
            @Override
            public void run() {
                listOfComponents.add(new Celli());
            }
        });
    }

    // waits until all threads completion
    try {
        threadPool.shutdown();      
        threadPool.awaitTermination(3, TimeUnit.SECONDS);
    } catch (InterruptedException e) {
        // seems to be a improbable exception, but we have to deal with it
        e.printStackTrace();
    }

    g.getChildren().addAll(listOfComponents);
}