Virtual rendering for combo

How can I make my combo virtual rendered !? I have 5000 record to show and it's slowwwwwwww !! :)
Thanks

I will try to allow virtual mode for the lists and combo on the future. Currently you can make it faster using more simple template (AW.Templates.Cell) -

combo.setItemTemplate(new AW.Templates.Cell);

I'm gonna try this...

Doesn't work... I'll try to code my own combo with virtual rendering