Vowpal Wabbit (one of the fastest learning implementations, from John Langford, also of Yahoo!) now has an "online" LDA implementation (Hoffman et al 2010: http

Vowpal Wabbit (one of the fastest learning implementations, from John Langford, also of Yahoo!) now has an "online" LDA implementation (Hoffman et al 2010: http://www.cs.princeton.edu/~blei/papers/HoffmanBleiBach2010b.pdf http://www.cs.princeton.edu/~blei/papers/HoffmanBleiBach2010...). It's probably the fastest single-core LDA implementation. http://hunch.net/?p=1594 http://hunch.net/?p=1594 http://www.machinedlearnings.com/2010/12/lightning-fast-lda.html http://www.machinedlearnings.com/2010/12/lightning-fast-lda....