scikit-learn/scikit-learn — comment on commit 7769275dc4fb9f5f8ea6448ecfbaffe4fdcbf1a6
File:  line 0
By amueller:

@ogrisel: if it's 500MB by default and someone is doing a gridsearch on a 4GB machine, you might be in trouble, right?
afaik this is an upper bound and not preallocated,