See my comments about cooccurrence. The memory and query-time computation costs are the result of doing the recommendation in two steps instead of doing teh coocurrence analysis offline.
On Fri, Jun 19, 2009 at 5:40 AM, Grant Ingersoll <[email protected]>wrote: > 2. Nah I don't think you want to go to all the trouble of >> transposing, that's quite heavy. I think you want one of two things >> based on your description: >> > > I don't know, "Programming Collective Intelligence" (page 17) seems to > suggest transposing as being pretty useful for product-product suggestions. > I suppose, however, that it really is just getting the neighborhood then > and not going the extra step of getting items (er users in this case). > > The main cost is in having a second model in memory, I suppose.
