http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375
--- Comment #187 from Jan Hubicka <hubicka at gcc dot gnu.org> --- WPA time report Execution times (seconds) phase setup : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall 1398 kB ( 0%) ggc phase opt and generate : 80.79 (13%) usr 1.01 ( 3%) sys 81.96 (12%) wall 315727 kB (25%) ggc phase stream in : 283.33 (45%) usr 7.82 (24%) sys 292.12 (44%) wall 940315 kB (74%) ggc phase stream out : 261.66 (42%) usr 23.14 (72%) sys 287.88 (43%) wall 7534 kB ( 1%) ggc garbage collection : 14.45 ( 2%) usr 0.02 ( 0%) sys 14.48 ( 2%) wall 0 kB ( 0%) ggc callgraph optimization : 2.55 ( 0%) usr 0.00 ( 0%) sys 2.55 ( 0%) wall 33 kB ( 0%) ggc ipa cp : 10.45 ( 2%) usr 0.36 ( 1%) sys 10.81 ( 2%) wall 456287 kB (36%) ggc ipa inlining heuristics : 42.12 ( 7%) usr 1.06 ( 3%) sys 43.27 ( 7%) wall 1485346 kB (117%) ggc ipa lto gimple in : 0.56 ( 0%) usr 0.25 ( 1%) sys 0.87 ( 0%) wall 0 kB ( 0%) ggc ipa lto gimple out : 21.77 ( 3%) usr 1.72 ( 5%) sys 23.53 ( 4%) wall 0 kB ( 0%) ggc ipa lto decl in : 183.90 (29%) usr 4.77 (15%) sys 189.46 (29%) wall 959299 kB (76%) ggc ipa lto decl out : 231.70 (37%) usr 10.78 (34%) sys 242.73 (37%) wall 0 kB ( 0%) ggc ipa lto cgraph I/O : 14.38 ( 2%) usr 1.57 ( 5%) sys 15.99 ( 2%) wall 2405760 kB (190%) ggc ipa lto decl merge : 32.16 ( 5%) usr 0.00 ( 0%) sys 32.24 ( 5%) wall 8268 kB ( 1%) ggc ipa lto cgraph merge : 28.72 ( 5%) usr 0.06 ( 0%) sys 28.81 ( 4%) wall 135235 kB (11%) ggc whopr wpa : 9.57 ( 2%) usr 0.05 ( 0%) sys 9.62 ( 1%) wall 7537 kB ( 1%) ggc whopr wpa I/O : 2.07 ( 0%) usr 10.62 (33%) sys 15.49 ( 2%) wall 0 kB ( 0%) ggc whopr partitioning : 3.26 ( 1%) usr 0.03 ( 0%) sys 3.29 ( 0%) wall 0 kB ( 0%) ggc ipa reference : 5.55 ( 1%) usr 0.05 ( 0%) sys 5.62 ( 1%) wall 0 kB ( 0%) ggc ipa profile : 2.82 ( 0%) usr 0.05 ( 0%) sys 2.88 ( 0%) wall 0 kB ( 0%) ggc ipa pure const : 6.25 ( 1%) usr 0.13 ( 0%) sys 6.38 ( 1%) wall 0 kB ( 0%) ggc unaccounted todo : 13.25 ( 2%) usr 0.28 ( 1%) sys 13.58 ( 2%) wall 0 kB ( 0%) ggc TOTAL : 625.79 31.97 661.97 1264976 kB