grouplens/lenskit — pull request #566 by elehack (2014-04-11 17:35:59+00:00)
Title: Speed and architecture improvements to user-user CF

This refactors the user-user CF implementation to have a saner boundary between the scorer and neighborhood-finding code, and implement a working snapshotting neighbor finder. Also makes some other improvements to evaluation.

It should be reviewed and merged after #565, since it depends on that code.