https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89557
--- Comment #11 from Jan Ziak (http://atom-symbol.net) <0xe2.0x9a.0x9b at gmail dot com> --- (In reply to Eric Gallager from comment #10) > > /usr/bin/time ./a0-7.4 |& egrep -o [0-9]+.*user > 1.48 real 1.26 user > /usr/bin/time ./ag-7.4 |& egrep -o [0-9]+.*user > 0.61 real 0.59 user > /usr/bin/time ./a1-7.4 |& egrep -o [0-9]+.*user > 0.57 real 0.55 user > > /usr/bin/time ./a0-8.3 |& egrep -o [0-9]+.*user > 1.27 real 1.21 user > /usr/bin/time ./ag-8.3 |& egrep -o [0-9]+.*user > 0.60 real 0.59 user > /usr/bin/time ./a1-8.3 |& egrep -o [0-9]+.*user > 0.60 real 0.59 user > /usr/bin/time ./a3-8.3 |& egrep -o [0-9]+.*user > 0.45 real 0.43 user > > /usr/bin/time ./ag-7.4n |& egrep -o [0-9]+.*user > 0.60 real 0.59 user > /usr/bin/time ./ag-8.3n |& egrep -o [0-9]+.*user > 0.61 real 0.59 user > > So, uh, I'm not sure if that's a confirmation, but it's an extra data point. Interesting. Your measurement is showing that there is no performance regression on your machine when going from ag-7.4 to ag-8.3. Some questions: - What CPU was used to obtain your results? - If you run "perf record ./ag-8.3; perf report", which instructions do you see highlighted when you enter the disassembly of function "mul"? On Ryzen 3700X, I see: 3.57% movdqu 0x70(%rsp), %xmm4 69.25% movups %xmm4, 0x30(%rsp) 9.32% jmpq 11bb Thanks. ---- Sidenote: The mirror http://gcc.fyxm.net at https://gcc.gnu.org/mirrors.html is invalid.
