https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114978
--- Comment #7 from Chen Chen <chz0808 at gmail dot com> --- (In reply to Richard Biener from comment #6) > https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=471.407.0 > > shows a recent improvement that then regressed again, maybe you have a > similar artifact with the choosing of the snapshots. Try a snapshot from > february for comparison for example. Thanks for the nice graph! We did more tests on AMD Zen4 CPU R9 7940HS (system: Debian 12) and used similar parameters as yours. The results are following: with parameters "-m64 -g -Ofast -march=native": 13.2.0: 30.0 (87.2s) [gcc 13.2 release] 20240121: 29.8 (88.0s) [gcc 14 snapshot] 20240218: 29.8 (88.0s) [gcc 14 snapshot] 20240303: 29.2 (89.8s) [gcc 14 snapshot] 20240310: 31.7 (82.6s) [gcc 14 snapshot] 20240317: 31.7 (82.7s) [gcc 14 snapshot] 20240324: 28.3 (92.5s) [gcc 14 snapshot] 20240430: 28.4 (92.3s) [gcc 14 snapshot, 14.1.0-RC] 14.1.0: 28.4 (92.4s) [gcc 14.1 release] with parameters "-m64 -g -Ofast -march=native -flto": 13.2.0: 30.5 (85.8s) [gcc 13.2 release] 20240121: 30.5 (85.9s) [gcc 14 snapshot] 20240218: 29.5 (88.7s) [gcc 14 snapshot] 20240303: 30.5 (86.0s) [gcc 14 snapshot] 20240310: 31.6 (82.8s) [gcc 14 snapshot] 20240317: 31.7 (82.7s) [gcc 14 snapshot] 20240324: 28.6 (91.6s) [gcc 14 snapshot] 20240430: 29.1 (89.9s) [gcc 14 snapshot, 14.1.0-RC] 14.1.0: 29.1 (90.1s) [gcc 14.1 release] The scores with gcc 14.1 release are 8.2-10.4% lower than those with gcc 14 snapshot 20240317, and 4.6-5.3% lower than those with gcc 13.2 release.
