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From Ted Dunning <>
Subject Re: Reminder: big collaborative filtering change in MAHOUT-151
Date Tue, 28 Jul 2009 20:41:52 GMT
Should this be a branch?

On Tue, Jul 28, 2009 at 9:44 AM, Sean Owen <> wrote:

> I have just attached my first cut at a patch, and it is massive
> indeed. This one removes "User", and along the way, attempts to remove
> some of the "Boolean" classes as they can kind of be rolled into the
> primary implementation.
> It compiles, it passes tests. I am still not done digging through the
> performance implications. Comments welcome.
> I wanted to spam the list again since this will probably break many
> user's implementations; it's not backwards-compatible. I also want to
> warn that, given the scale of the change, there could be new bugs, and
> could be new performance implications which will take a little time to
> work through. If you're concerned about this, don't update past the
> code as it exists in SVN right now, for a while.

Ted Dunning, CTO

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