On 13.07.2011 08:12, Salil Apte wrote:
Is an item based approached preferable when considering speed?
Itembased approaches are said to scale better as there exist less items than users in most usecases and item-item-similarities can be precomputed.
But before you change your setup we should do a little more investigation. Are you using ReloadFromJDBCDataModel? If you aren't, give that a try, it will hold your preference data in RAM which shouldn't be a big problem with 61k preferences and should reasonably speed up your calculations.
--sebastian
