https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80960
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Timings and memory use for various releases. They show a timing regression for gcc-7 and trunk compared to gcc-6. % time gfortran-4.8.5 pr80960_db.f90 -fdefault-integer-8 -O2 -ftime-report ... phase opt and generate : 349.98 (100%) usr 5.90 (99%) sys 356.90 (100%) wall 1986145 kB (100%) ggc ... combiner : 194.33 (55%) usr 3.10 (52%) sys 197.71 (55%) wall 1754287 kB (88%) ggc ... TOTAL : 350.37 5.93 357.33 1995723 kB % time gfortran-4.9.3 pr80960_db.f90 -fdefault-integer-8 -O2 -ftime-report ... phase opt and generate : 264.34 (100%) usr 6.55 (99%) sys 272.05 (100%) wall 6179333 kB (100%) ggc ... combiner : 204.75 (77%) usr 3.75 (57%) sys 209.44 (77%) wall 5948591 kB (96%) ggc ... TOTAL : 264.72 6.59 272.52 6189174 kB % time gfortran-5.4 pr80960_db.f90 -fdefault-integer-8 -O2 -ftime-report ... phase opt and generate : 235.60 (100%) usr 3.54 (93%) sys 239.57 (100%) wall 4455669 kB (100%) ggc ... combiner : 160.31 (68%) usr 1.40 (37%) sys 161.98 (67%) wall 1624073 kB (36%) ggc ... TOTAL : 236.00 3.79 240.26 4465708 kB % time gfortran-6.3 pr80960_db.f90 -fdefault-integer-8 -O2 -ftime-report ... phase opt and generate : 138.71 (100%) usr 2.42 (92%) sys 141.23 (99%) wall 4493675 kB (100%) ggc ... combiner : 74.35 (53%) usr 1.11 (42%) sys 75.45 (53%) wall 2700700 kB (60%) ggc ... TOTAL : 139.16 2.64 141.97 4503966 kB % time gfortran-7.1 pr80960_db.f90 -fdefault-integer-8 -O2 -ftime-report ... phase opt and generate : 233.01 (100%) usr 3.72 (90%) sys 237.31 (99%) wall 4498167 kB (100%) ggc ... combiner : 158.53 (68%) usr 1.97 (48%) sys 160.90 (67%) wall 2700700 kB (60%) ggc ... TOTAL : 233.47 4.13 238.51 4508597 kB % time gfortran-8.0 pr80960_db.f90 -fdefault-integer-8 -O2 -ftime-report ... phase opt and generate : 235.01 (100%) usr 3.44 (93%) sys 238.88 (100%) wall 4498191 kB (100%) ggc ... combiner : 159.18 (68%) usr 1.79 (48%) sys 161.19 (67%) wall 2700700 kB (60%) ggc ... TOTAL : 235.47 3.70 239.66 4508355 kB
