I've learned a lot from the NLTK library, but unfortunately NLTK is terribly slow. Nevertheless, it is a fantastic place for beginners to start with text proces

I've learned a lot from the NLTK library, but unfortunately NLTK is terribly slow. Nevertheless, it is a fantastic place for beginners to start with text processing and learn from as the documentation is superb. However eventually one may want to start digging into the NLTK source to rewrite necessary functions using multiprocessing if they plan to process any "big" textual datasets.