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Now every submenu expansion delay is ~1second, which is useless if you know where to go... See this article how Amazon solved this: http://bjk5.com/post/44698559168/breaking-down-amazons-mega-dropdown Could we consider doing the same in Netbeans?
Which platform are you on? It's less than half a second delay on MS Windows...
I'm on Solaris 11
Menus are implemented in the Java platform, there's no reliable way to implement Amazon-like menu expansions.