agreed with Ian; if you are thinking of parallelizing over the tokens list, then it is as a Ian says. If you are interested in making many predictions, i.e. say over a large collection of tokenized text, then potentially this can be worked into predict() or added as another method; however, I am not convinced this should be handled by the LDAResults class, since a user can simply take imap_easy() from the parallel module and wrap .predict() to parallelize over the collection. Thoughts?...