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

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

    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

  • #2
    why no
    Code:
    -O3 -march=x86-64 -flto
    ?

    Comment


    • #3
      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.

      Comment


      • #4
        i wonder how graphicsmagick would respond to lto+pgo

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        • #5
          gcc11 does not handle this very well (false warning)
          sprintf(x,"%04d/%02d/%[email protected]%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/[email protected]:09:28" //19 bytes plus null

          clang does it without complaining.

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