http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375
--- Comment #206 from Martin Liška <mliska at suse dot cz> --- Firefox (and chromium) memory reports with -flto=9 and -O2; archive contains also memory usage graph: https://docs.google.com/file/d/0B0pisUJ80pO1bnV5V0RtWXJkaVU/edit
