title: Is there good library to do nonnegative matrix factorization (NMF) fast?
body: <p>I have a sparse matrix whose shape is <strong>570000*3000</strong>.  I tried <a href="http://nimfa.biolab.si/" rel="nofollow">nima</a> to do NMF (using the default nmf method, and set <code>max_iter</code> to 65). However, I found nimfa very slow. Have anyone used a faster library to do NMF? </p>