performance issue - long response time on checkboxes in several layers of embedded ui widget (e.g. tabs)

performance issue - long response time on checkboxes in several layers of embedded ui widget (e.g. tabs)

Hi all,

I've one page having 4 layers of embedding tabbedpanel. In the inner most panel I've more than 30 checkboxes. In this case, clicking on the checkboxes take long time to change there states. When there are more DOM elements in the panel, it becomes worse.
More tests showed that the issue occurs for any input control in the panel and seems true for all ui widgets that can be embedded. In addition, the issue only occurs in FireFox. It works fine in IE and Google Chrome.

Below is the screenshot for your reference. I've attached the html file used to test as well. As the file extension is not allowed, I removed it. Please add an extension .html to test it.

Any help is greatly appreciated!