That is a long time for such a small qr decomposition. I wouldn't think that the actually solving would add that much time, either.
On Thu, Jan 24, 2013 at 2:00 AM, Ying Liao <[email protected]> wrote: > Hi! > The QRDecomposition turns out to be my bottleneck in deploying ALS-WR. It > takes less than a ms to solve X=A^{-1}B when A is 20*20. But it takes 55ms > per solve when A is 60*60. Is there a different approach to solve AX=B? > > Thanks, > Ying >
