AFS allows to select finely the content of the reply feed: documents and facets, facets only or selected facets...
It is interesting to use the associated options to reduce the duration of queries and the transfer time of reply.
Production time of a reply page is proportional, amongst others, to the number of reply required (usually 10 per page).
It is costly to ask for more answers than necessary. It is probably unwise to ask AFS to provide all the answers of a query and then hide some to make navigation within the various pages.