Is it worth simply using the Commons Math implementation?
On Mon, Jan 28, 2013 at 8:04 AM, Sebastian Schelter <s...@apache.org> wrote: > This is great news and will automatically boost the performance of all > our ALS-based recommenders which are all using QRDecomposition internally. > > On 28.01.2013 04:02, Ted Dunning wrote: >> Did that. >> >> You are right. The QRD in mahout is abysmally slow. I wrote a new version >> on the airplane that seems to be about 10x faster and still jsut about as >> accurate (and vastly simpler). I will put up some tests and a patch in the >> next week or so. >
