I use GetFeature Control for hover functionality, but sometimes
WMSGetFeatureInfo with hover with an Html template backend is good
enough. (When your application only needs to display the attributes, not
do any other processing of them). I use selectfeature for "info" and
"polygon" tool which usually have the assumption that multiple features
will be returned - display list of features in a popup and the user
doing further processing from there.
Depending on database size, you could try some pre-load tricks. onmove
you issue WFS GetFeature for the area covered by the map but ONLY for
attributes, not shape (that should reduce your download size). Then you
need only featureid returned from hover and look up the other attributes
in the preloaded table.
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