Python or Java for text processing (text mining, information retrieval, natural language processing) [closed]

Answer 1

It's very difficult to answer questions like this without trying. So why don't you

1. Figure out what would be a difficult operation
2. Implement that (and I mean the simplest, quickest hack that you can make work)
3. Run it with a lot of data, and see how long it takes
4. Figure out if it's too slow

I've done this in the past and it's really the way to see if something performs well enough for something.