------- Comment #29 from steven at gcc dot gnu dot org 2006-01-08 16:02 ------- User times:
optimization | GCC version level | 3.3-hammer 4.0 4.1 ----------------+------------------------------------------------ -O0 | 0m7.248s 0m1.684s 0m1.800s -O1 | 0m24.786s 0m18.489s 0m18.749s -O2 | 0m30.390s 0m54.147s 1m9.636s The top 5 time consumers for each compiler: timevar | GCC version at -O2 | 3.3-hammer 4.0 4.1 ----------------+-------------------------------------------------- 1. | cfg cleanup (45%) dom. front. (24%) tree VRP (27%) 2. | branch pred. (21%) CPROP 1 (17%) dom. front. (14%) 3. | rest of comp. (10%) CPROP 2 (13%) CPROP 1 (14%) 4. | CSE 2 (8%) bypass jumps (13%) CPROP 2 (10%) 5. | global CSE (3%) CSE (9%) bypass jumps (9%) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097
