1. A computer-implemented method comprising: receiving a first character of a query associated with a user of a social networking system in response to the user entering the first character into a text area displayed in a client device; obtaining a first result set comprising a plurality of objects from an object store of the social networking system that match the first character of the query; ordering at least a plurality of the objects of the first result set based at least in part on measures of affinities of the user for the objects, the measures of affinities of the user for the objects based at least in part on information about the user stored by the social networking system; providing at least a portion of the first result set to the client device; receiving a second character of the query in response to the user entering an the second character into the text area; obtaining a second result set of objects from the object store that match the first and second characters of the query; and providing at least a portion of the second result set to the client device.