: I would be shocked if you noticed any performance difference between a : single-valued field and a multivalued field with one entry.
there shouldnt' be any difference at all in search performance, or index size ... marking a field multiValued should only have two effects: 1) on document add/update no error will be thrown if more then one value is enncountered 2) the response writer may created a slightly larger response document since it's rendering a list instead of an item (even if every document returned only has one item in the list) (this is one of hte big differneces between using version=2.0 and version=2.1 with XmlResponseWriter ... in 2.0 it would only make a list if there is more then one item - even if the field is multiValued) -Hoss
