scikit-learn/scikit-learn — pull request #2078 by ahojnnes (2013-06-18 00:44:53+00:00)
Title: Refactor euclidean distance metric in Cython

Not a major performance gain, but timeit on 1000x3 feature set reports a speedup from 15ms to 10ms on my system.

Since this function is used quite a lot in scikit-learn it should speedup the whole package quite a bit.