Country/Land dropdownindex

Hi,

Can anyone help me with the following !!

I need to let the user select a country from a Webdynpro view.

It is possible to load all the entries onetime when the view is first time displayed or load the entries dynamicaly according to the user input(Say,if user types "Man",then it load all the countries starting "Man").

My question is

1.Is there any better known solution in context with Performance ?.

2.Is there any other special webdynpro UI for this purpose ?