Skylake Xeon GCC vs. Clang Compiler Optimization Tests Intel Xeon E3-1280 v5 testing with a MSI C236A WORKSTATION. GCC versus LLVM Clang compiler optimization CFLAGS/CXXFLAGS benchmarks by Michael Larabel for a future article on Phoronix.
HTML result view exported from: https://openbenchmarking.org/result/1602297-GA-SKYLAKEXE76&grt&sro .
Processor Motherboard Chipset Memory Disk Graphics Audio Monitor Network OS Kernel Desktop Display Server Display Driver OpenGL Compiler File-System Screen Resolution GCC Clang -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores) MSI C236A WORKSTATION (MS-7998) v1.0 Intel Sky Lake 16384MB 120GB Samsung SSD 850 MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB Realtek ALC1150 DELL P2415Q Intel Connection Ubuntu 16.04 4.4.0-7-generic (x86_64) Unity 7.4.0 X Server 1.17.3 radeon 7.6.1 4.1 Mesa 11.1.2 Gallium 0.4 GCC 5.3.1 20160222 ext4 3840x2160 Clang 3.8.0-+rc2-1~exp1ubuntu2 OpenBenchmarking.org Compiler Details - GCC: -O0, GCC: -O1, GCC: -O2, GCC: -O2 -march=native, GCC: -O3, GCC: -O3 -march=native, GCC: -Ofast -march=native: --build=x86_64-linux-gnu --disable-browser-plugin --disable-vtable-verify --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-gtk-cairo --enable-java-awt=gtk --enable-java-home --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --enable-libmpx --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-abi=m64 --with-arch-32=i686 --with-arch-directory=amd64 --with-default-libstdcxx-abi=new --with-multilib-list=m32,m64,mx32 --with-tune=generic -v Processor Details - Scaling Governor: intel_pstate powersave
c-ray: Total Time encode-flac: WAV To FLAC graphics-magick: Blur graphics-magick: HWB Color Space graphics-magick: Local Adaptive Thresholding hint: FLOAT himeno: Poisson Pressure Solver encode-mp3: WAV To MP3 redis: GET redis: SET build-apache: Time To Compile hmmer: Pfam Database Search build-imagemagick: Time To Compile build-php: Time To Compile GCC Clang -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 61.53 37.56 107 136 22 127505415.48 496.06 30.50 1663526.96 1189110.86 11.08 26.89 12.23 7.27 43.15 5.97 170 226 92 295705864.24 1302.83 13.25 2953039.46 2175575.75 17.00 8.86 24.96 13.35 38.19 5.22 169 213 100 370257620.55 2429.37 12.90 3007445.96 2136957.54 23.12 8.35 39.67 19.12 27.83 4.87 173 228 103 408904948.74 2653.07 11.99 2951037.21 2076614.15 22.84 8.35 37.57 18.68 19.65 5.10 170 228 103 381719210.59 2485.14 12.10 2910194.79 2183433.83 24.88 8.17 49.70 21.21 14.60 4.88 178 234 104 407575756.08 2689.91 10.69 3116395.33 2104521.04 25.17 8.16 48.97 21.68 13.92 4.89 177 237 104 392373251.20 2757.77 9.51 3023321.58 2243907.58 25.16 8.00 49.99 21.75 57.09 47.95 75 100 22 129742642.75 325.27 31.95 1864548.29 1263741.85 10.93 23.23 9.78 6.44 32.34 6.97 150 192 89 335679881.79 1931.06 12.04 3067218.96 1977929.48 18.85 8.97 31.07 13.58 37.29 6.66 150 193 100 387996153.74 2036.00 12.17 2962310.25 2127555.19 22.36 8.29 36.53 16.96 36.22 5.26 150 196 99 288801639.39 1923.64 12.03 3102899.83 2064604.79 23.10 8.29 38.45 17.92 25.61 6.71 150 192 100 386593550.68 2001.77 12.16 2923813.88 1962280.52 22.83 8.40 49.59 17.59 25.20 5.11 153 196 102 296846752.57 1962.71 11.66 2862656.75 2037699.96 23.07 8.29 49.63 17.90 20.64 5.05 153 198 101 295042490.70 2114.80 11.10 3100373.25 2078148.71 23.15 8.12 50.02 17.95 OpenBenchmarking.org
C-Ray Total Time Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better C-Ray 1.1 Total Time -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 14 28 42 56 70 SE +/- 0.04, N = 3 SE +/- 0.00, N = 3 SE +/- 0.01, N = 3 SE +/- 0.05, N = 3 SE +/- 0.01, N = 3 SE +/- 0.01, N = 3 SE +/- 0.03, N = 3 SE +/- 0.02, N = 3 SE +/- 0.00, N = 3 SE +/- 0.01, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.02, N = 3 SE +/- 0.03, N = 3 57.09 32.34 37.29 36.22 25.61 25.20 20.64 61.53 43.15 38.19 27.83 19.65 14.60 13.92 1. (CC) gcc options: -lm -lpthread -O3
FLAC Audio Encoding WAV To FLAC Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better FLAC Audio Encoding 1.3.1 WAV To FLAC -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 11 22 33 44 55 SE +/- 0.14, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.04, N = 5 SE +/- 0.02, N = 5 SE +/- 0.00, N = 5 SE +/- 0.09, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.00, N = 5 SE +/- 0.02, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 47.95 6.97 6.66 5.26 6.71 5.11 5.05 37.56 5.97 5.22 4.87 5.10 4.88 4.89 1. (CXX) g++ options: -fvisibility=hidden -logg -lm
GraphicsMagick Operation: Blur Clang GCC OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.19 Operation: Blur -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 40 80 120 160 200 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 75 150 150 150 150 153 153 107 170 169 173 170 178 177 1. (CC) gcc options: -fopenmp -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lSM -lICE -lX11 -llzma -lbz2 -lz -lm -lgomp -lpthread
GraphicsMagick Operation: HWB Color Space Clang GCC OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.19 Operation: HWB Color Space -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 50 100 150 200 250 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.58, N = 3 SE +/- 0.00, N = 3 SE +/- 0.67, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 100 192 193 196 192 196 198 136 226 213 228 228 234 237 1. (CC) gcc options: -fopenmp -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lSM -lICE -lX11 -llzma -lbz2 -lz -lm -lgomp -lpthread
GraphicsMagick Operation: Local Adaptive Thresholding Clang GCC OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.19 Operation: Local Adaptive Thresholding -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 20 40 60 80 100 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 22 89 100 99 100 102 101 22 92 100 103 103 104 104 1. (CC) gcc options: -fopenmp -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lSM -lICE -lX11 -llzma -lbz2 -lz -lm -lgomp -lpthread
Hierarchical INTegration Test: FLOAT Clang GCC OpenBenchmarking.org QUIPs, More Is Better Hierarchical INTegration 1.0 Test: FLOAT -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 90M 180M 270M 360M 450M SE +/- 202624.96, N = 3 SE +/- 327258.73, N = 3 SE +/- 684099.81, N = 3 SE +/- 169985.20, N = 3 SE +/- 732618.55, N = 3 SE +/- 107212.94, N = 3 SE +/- 189622.82, N = 3 SE +/- 333507.82, N = 3 SE +/- 261713.92, N = 3 SE +/- 807099.70, N = 3 SE +/- 839964.65, N = 3 SE +/- 705518.12, N = 3 SE +/- 469746.65, N = 3 SE +/- 623958.85, N = 3 129742642.75 335679881.79 387996153.74 288801639.39 386593550.68 296846752.57 295042490.70 127505415.48 295705864.24 370257620.55 408904948.74 381719210.59 407575756.08 392373251.20 1. (CC) gcc options: -lm
Himeno Benchmark Poisson Pressure Solver Clang GCC OpenBenchmarking.org MFLOPS, More Is Better Himeno Benchmark 3.0 Poisson Pressure Solver -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 600 1200 1800 2400 3000 SE +/- 4.31, N = 3 SE +/- 3.51, N = 3 SE +/- 5.22, N = 3 SE +/- 0.78, N = 3 SE +/- 1.61, N = 3 SE +/- 14.49, N = 3 SE +/- 3.27, N = 3 SE +/- 1.58, N = 3 SE +/- 7.15, N = 3 SE +/- 2.14, N = 3 SE +/- 5.04, N = 3 SE +/- 2.83, N = 3 SE +/- 13.72, N = 3 SE +/- 8.78, N = 3 325.27 1931.06 2036.00 1923.64 2001.77 1962.71 2114.80 496.06 1302.83 2429.37 2653.07 2485.14 2689.91 2757.77 1. (CC) gcc options: -O3 -mavx2
LAME MP3 Encoding WAV To MP3 Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better LAME MP3 Encoding 3.99.3 WAV To MP3 -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 7 14 21 28 35 SE +/- 0.09, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.03, N = 5 SE +/- 0.02, N = 5 SE +/- 0.02, N = 5 SE +/- 0.01, N = 5 SE +/- 0.07, N = 5 SE +/- 0.00, N = 5 SE +/- 0.03, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.02, N = 5 SE +/- 0.01, N = 5 31.95 12.04 12.17 12.03 12.16 11.66 11.10 30.50 13.25 12.90 11.99 12.10 10.69 9.51 1. (CC) gcc options: -pipe -lncurses -lm
Redis Test: GET Clang GCC OpenBenchmarking.org Requests Per Second, More Is Better Redis 3.0.1 Test: GET -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 700K 1400K 2100K 2800K 3500K SE +/- 5812.17, N = 3 SE +/- 114553.51, N = 6 SE +/- 107422.82, N = 6 SE +/- 28358.49, N = 3 SE +/- 100673.54, N = 6 SE +/- 117026.48, N = 6 SE +/- 43230.51, N = 5 SE +/- 38735.61, N = 6 SE +/- 149849.11, N = 6 SE +/- 115634.67, N = 6 SE +/- 147992.17, N = 6 SE +/- 114387.02, N = 6 SE +/- 112169.48, N = 6 SE +/- 119850.30, N = 6 1864548.29 3067218.96 2962310.25 3102899.83 2923813.88 2862656.75 3100373.25 1663526.96 2953039.46 3007445.96 2951037.21 2910194.79 3116395.33 3023321.58 1. (CC) gcc options: -ggdb -rdynamic -lm -pthread -ldl
Redis Test: SET Clang GCC OpenBenchmarking.org Requests Per Second, More Is Better Redis 3.0.1 Test: SET -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 500K 1000K 1500K 2000K 2500K SE +/- 18772.48, N = 5 SE +/- 89985.99, N = 6 SE +/- 48427.64, N = 6 SE +/- 37304.29, N = 3 SE +/- 78877.64, N = 6 SE +/- 55315.76, N = 6 SE +/- 51322.74, N = 6 SE +/- 18888.09, N = 6 SE +/- 42146.85, N = 3 SE +/- 42585.88, N = 3 SE +/- 59339.63, N = 6 SE +/- 5504.91, N = 3 SE +/- 62171.83, N = 6 SE +/- 9379.40, N = 3 1263741.85 1977929.48 2127555.19 2064604.79 1962280.52 2037699.96 2078148.71 1189110.86 2175575.75 2136957.54 2076614.15 2183433.83 2104521.04 2243907.58 1. (CC) gcc options: -ggdb -rdynamic -lm -pthread -ldl
Timed Apache Compilation Time To Compile Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better Timed Apache Compilation 2.4.7 Time To Compile -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 6 12 18 24 30 SE +/- 0.12, N = 3 SE +/- 0.03, N = 3 SE +/- 0.06, N = 3 SE +/- 0.04, N = 3 SE +/- 0.04, N = 3 SE +/- 0.05, N = 3 SE +/- 0.05, N = 3 SE +/- 0.05, N = 3 SE +/- 0.07, N = 3 SE +/- 0.03, N = 3 SE +/- 0.07, N = 3 SE +/- 0.04, N = 3 SE +/- 0.05, N = 3 SE +/- 0.04, N = 3 10.93 18.85 22.36 23.10 22.83 23.07 23.15 11.08 17.00 23.12 22.84 24.88 25.17 25.16
Timed HMMer Search Pfam Database Search Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better Timed HMMer Search 2.3.2 Pfam Database Search -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 6 12 18 24 30 SE +/- 0.03, N = 3 SE +/- 0.02, N = 3 SE +/- 0.02, N = 3 SE +/- 0.01, N = 3 SE +/- 0.09, N = 3 SE +/- 0.02, N = 3 SE +/- 0.01, N = 3 SE +/- 0.02, N = 3 SE +/- 0.02, N = 3 SE +/- 0.01, N = 3 SE +/- 0.01, N = 3 SE +/- 0.00, N = 3 SE +/- 0.02, N = 3 SE +/- 0.00, N = 3 23.23 8.97 8.29 8.29 8.40 8.29 8.12 26.89 8.86 8.35 8.35 8.17 8.16 8.00 1. (CC) gcc options: -pthread -lhmmer -lsquid -lm
Timed ImageMagick Compilation Time To Compile Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better Timed ImageMagick Compilation 6.9.0 Time To Compile -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 11 22 33 44 55 SE +/- 0.06, N = 3 SE +/- 0.05, N = 3 SE +/- 0.05, N = 3 SE +/- 0.17, N = 3 SE +/- 0.12, N = 3 SE +/- 0.05, N = 3 SE +/- 0.10, N = 3 SE +/- 0.04, N = 3 SE +/- 0.04, N = 3 SE +/- 0.04, N = 3 SE +/- 0.04, N = 3 SE +/- 0.07, N = 3 SE +/- 0.02, N = 3 SE +/- 0.18, N = 3 9.78 31.07 36.53 38.45 49.59 49.63 50.02 12.23 24.96 39.67 37.57 49.70 48.97 49.99
Timed PHP Compilation Time To Compile Clang GCC OpenBenchmarking.org Seconds, Fewer Is Better Timed PHP Compilation 5.2.9 Time To Compile -O0 -O1 -O2 -O2 -march=native -O3 -O3 -march=native -Ofast -march=native 5 10 15 20 25 SE +/- 0.01, N = 3 SE +/- 0.02, N = 3 SE +/- 0.03, N = 3 SE +/- 0.08, N = 3 SE +/- 0.03, N = 3 SE +/- 0.04, N = 3 SE +/- 0.01, N = 3 SE +/- 0.03, N = 3 SE +/- 0.03, N = 3 SE +/- 0.04, N = 3 SE +/- 0.03, N = 3 SE +/- 0.03, N = 3 SE +/- 0.04, N = 3 SE +/- 0.02, N = 3 6.44 13.58 16.96 17.92 17.59 17.90 17.95 7.27 13.35 19.12 18.68 21.21 21.68 21.75 1. (CC) gcc options: -pedantic -ldl -lz -lm
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