Hi, in general the script is designed carefully so that both the load and runtime speed depend as little as possible on the size of the unordered list – e.g. event delegation is used instead of hooking events to the menu items directly, most calculations and sub menu initialization tasks are done on demand at runtime, etc… So the script should handle big or even huge lists quite well. Here is a quick demo using the latest version (you may need to enlarge your browser window to test the dropdowns instead of the collapsible mode):
http://jsfiddle.net/4gscz846/1/
The list is an actual real world example from a client that I’ve used for testing during the development of the jQuery plugin (though he used it with the original non-jQuery version of the script).
Cheers!