http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60291
--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> --- For -ftime-report -O1 most highlighting lines are: phase opt and generate : 175.81 (98%) usr 4.61 (51%) sys 180.95 (95%) wall 1833542 kB (86%) ggc expand : 20.05 (11%) usr 0.71 ( 8%) sys 20.29 (11%) wall 171351 kB ( 8%) ggc remove unused locals : 116.72 (65%) usr 0.90 (10%) sys 117.77 (62%) wall 0 kB ( 0%) ggc