mozilla/configman — pull request #118 by twobraids (2014-07-31 13:13:55+00:00)
Title: replace slow list with faster ordered set

Within Configman, DotDict and its derivatives, DotDictWithAcquisition and Namespace, are ordered dictionaries. Until now, the order of the keys was kept in a list. This was slow since linear search was the only way to test if a key was present. This PR replaces that slow list with a true OrderedSet implementation.