ComboBox always load all items

I have a BackEndDataProvider that is feeding a ComboBox and a Grid. The Grid loads data in chunks but the ComboBox is always loading the full list of items.

Is this by design? Also, does it mean that we should not use ComboBox for displaying large lists?

This feature is not yet supported in Vaadin 10/11 version of the ComboBox, there is a backlog ticket about it here and corresponding ticket about client side development here

Thanks Tatu for the info.