I tried the 10M dataset from grouplen. Is it the reason I do the project in my
own laptop? It is Intel 2 core 2.4 GB, and RAM 3GB, and Win7 OS.
And blow is profiled code.
-----------------------------------------------------
//Precompute the model, itemSimilarity.
DataModel model = new GroupLensDataModel(new File("ratings.dat"));
ItemSimilarity itemSimilarity = null;
try {
itemSimilarity = new PearsonCorrelationSimilarity(model);
} catch (TasteException e) {
e.printStackTrace();
}
Recommender recommender = new GenericItemBasedRecommender(model,itemSimilarity);
-----------------------------------------
//Below method consume more than 1min to generate result.
itembased_items = recommender.recommend(user_id, 10);
--------------------------------------------------
Should I try slope-one?
