scikit-learn/scikit-learn — comment on commit b3839837cf949db8e9122807578ebce6bf3d6fb4
File:  line 0
By mblondel:

@amueller is raising a good point in this commit.

One thing that worries me is that, with the introduction of scale_C, SVC, LinearSVC and LogisticRegression are now optimized for *cross-validation* and default values now don't work well because they are much too small after scaling. Sure, one should theoritically always tune parameters by cross-validation but practitioners often don't bother and for some models like logistic regression, the default choice of C=1.0 is hard to beat.