dlwh/breeze — pull request #18 by mengxr (2014-02-20 23:32:21+00:00)
Title: added a specialized version for norm(DenseVector[Double])

Since Double is perhaps the most popular value type, it may be worthing making it special.

With this implementation, the computation of norm for DenseVector[Double] speeds up 6-7x, though it is still slower (about 0.3x) than a bare-bone implementation.