Speeding up Latent Dirichlet Allocation
The code to our LDA implementation on Hadoop is released on Github under the Mozilla Public License. It’s seriously fast and scales very well to 1000 machines or more (don’t worry, it runs on a single machine, too). We believe that at present this is the fastest implementation you can find, in particular if you want to have a) 1000s of topics, b) a large dictionary, c) a large number of documents,
Hashing for Collaborative Filtering
This is a follow-up on the hashing for linear functions post. It’s based on the HashCoFi paper that Markus Weimer, Alexandros Karatzoglou and I wrote for AISTATS'10. It deals with the issue of running out of memory when you want to use collaborative filtering for very large problems. Here’s the setting: Assume you want to do Netflix-style collaborative filtering, i.e. you want to estimate entries
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