MenuBar: Vaadin 6 vs 7

Hi,

I'm quite disappointed with the Menubar under Vaadin 7. Two main problems :

• It's slower :o how to improve the performance ?
• html content don't work as it should. On the next exemple, if you click on the "test" menuItem, you will be redirected to my link with vaadin 6 but not with vaadin 7

Exemple:

Button b1 = new Button("add menu");
b1.addListener(new ClickListener() {
   @Override
   public void buttonClick(ClickEvent event) {
      layout.addComponent(getMenuBar());
   }
});
layout.addComponent(b1);

With the "getMenuBar" function :

private MenuBar getMenuBar() {
        MenuBar menuBar = new MenuBar();
        menuBar.setAutoOpen(true);
        menuBar.setHtmlContentAllowed(true);
        menuBar.addItem("<a href=\"https://www.google.com/\">test</a>", new Command() {
            @Override
            public void menuSelected(MenuItem selectedItem) {
                System.out.println("click");
            }
        });
        for (int i = 0; i < 5; i++) {
            MenuItem item = menuBar.addItem("root" + new Random().nextInt(),
                    null);
            for (int j = 0; j < 10; j++) {
                MenuItem subItemJ = addRandomItem(item);
                for (int k = 0; k < 10; k++) {
                    MenuItem subItemK = addRandomItem(subItemJ);
                    for (int l = 0; l < 10; l++) {
                        MenuItem subItemL = addRandomItem(subItemK);
                        for (int m = 0; m < 10; m++) {
                            addRandomItem(subItemL);
                        }
                    }
                }
            }
        }
        System.out.println("MenuBar created");
        return menuBar;
    }

    private MenuItem addRandomItem(MenuItem menuItem) {
        return menuItem.addItem("random" + new Random().nextInt(), null);
    

Any idea is welcome   

Nobody ?

Stats on Firefox 42:

Vaadin 6:

• Server visit took 372ms
• JSON parsing took 42ms
• Processing time was 4358ms for 2710560 characters of JSON

Vaadin 7:

• Server visit took 270ms
• JSON parsing took 67ms
• Processing time was 21838ms for 2655031 characters of JSON