http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50160
--- Comment #2 from Jonathan Schmidt-Dominé <de...@the-user.org> 2011-08-23 13:50:09 UTC --- Well, it made my specific application very slow, when using vector<bool> as key_type for (ordered) map. What kind of numbers would be usefull? I think it should simply have a specialised operator< implementation comparing chunks of 32/64 bits, there is also a specialised hash implementation, it should be like that one.