GCC 10 vs. GCC 11 Compiler Performance On AMD Zen 3

[phoronix]

Phoronix: GCC 10 vs. GCC 11 Compiler Performance On AMD Zen 3

After recently looking at the early LLVM Clang 12 compiler performance on the AMD Ryzen 9 5950X, in today's benchmarking is a look at how the GCC 11 compiler performance is looking in its near final state compared to GCC 10 under a variety of build CFLAGS/CXXFLAGS configurations on the AMD Zen 3 desktop.

http://www.phoronix.com/vr.php?view=29980

[smartalgorithm]

why no

-O3 -march=x86-64 -flto

?

[equeim]

Have you considered doing RAM usage benchmarks along with compilations times? It would be very interesting to know how it changes across GCC versions / compiler options.

[pal666]

i wonder how graphicsmagick would respond to lto+pgo

[lsatenstein]

gcc11 does not handle this very well (false warning)
sprintf(x,"%04d/%02d/%02d@%02d:%02d:%02d",dy,dm,dd,th,tm,ts);
all variabls are unsigned. except x[20]
says I am overflowing the field widths.
x is "2021/02/25@11:09:28" //19 bytes plus null

clang does it without complaining.