GCC 4.7 LLVM Clang 3.1 Compiler Performance Compiler performance benchmarks using GCC 4.6.3, GCC 4.7.0, LLVM Clang 3.0, and LLVM Clang 3.1 SVN from 23 March. Testing for a future article on Phoronix.com. Using an Intel Core i7 3960X Sandy Bridge Extreme Edition clocked at 4.5GHz with 12 threads (six physical + HT).
HTML result view exported from: https://openbenchmarking.org/result/1203235-SU-GCC47LLVM92&rdt&grr .
GCC 4.7 LLVM Clang 3.1 Compiler Performance Processor Motherboard Chipset Memory Disk Graphics Audio Monitor Network OS Kernel Desktop Display Server Display Driver OpenGL Compiler File-System Screen Resolution LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 Intel Core i7-3960X @ 3.20GHz (12 Cores) Intel DX79SI Intel Sandy DMI2 16384MB 240GB OCZ VERTEX3 AMD Radeon HD 7900 3072MB (900/1375MHz) Realtek ALC892 DELL P2210H Intel 82579LM Gigabit Connection Ubuntu 12.04 3.2.0-18-generic (x86_64) Unity 5.6.0 X Server 1.11.3 fglrx 8.95.3 Catalyst 12.2 4.2.11554 Clang 3.1 (SVN 153339) + LLVM 3.1svn ext4 1920x1080 Clang 3.0 + LLVM 3.0 GCC 4.7.0 GCC 4.6.3 OpenBenchmarking.org Compiler Details - LLVM-Clang 3.1 SVN: Optimized build; Built Mar 23 2012 (08:53:34); Default target: x86_64-unknown-linux-gnu; Host CPU: corei7-avx - LLVM-Clang 3.0: Optimized build; Built Mar 23 2012 (11:30:39); Host: x86_64-unknown-linux-gnu; Host CPU: corei7-avx - GCC 4.7.0: --enable-checking=release --enable-languages=c,c++ - GCC 4.6.3: --enable-checking=release --enable-languages=c,c++ System Details - Compiz was running on this system.
GCC 4.7 LLVM Clang 3.1 Compiler Performance smallpt: Global Illumination Renderer; 100 Samples nero2d: Total Time ffmpeg: AVI To NTSC VCD encode-ogg: WAV To Ogg compress-lzma: 256MB File Compression c-ray: Total Time hmmer: Pfam Database Search himeno: Poisson Pressure Solver byte: Dhrystone 2 graphics-magick: Sharpen graphics-magick: Resizing graphics-magick: Local Adaptive Thresholding graphics-magick: HWB Color Space graphics-magick: Blur vpxenc: vpxenc LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 176 546.24 12.17 9.49 160.86 32.40 10.34 1280.03 21549720.13 29 86 25 100 65 22.00 162 12.39 9.46 163.40 35.38 10.61 1275.17 20 66 21 100 72 21.46 20 543.94 12.32 9.44 154.97 25.92 9.22 1322.56 21265475.60 98 152 85 163 123 23.28 20 557.09 12.42 9.46 155.29 34.01 9.17 1270.05 21842507.83 98 151 85 162 123 23.86 OpenBenchmarking.org
Smallpt Global Illumination Renderer; 100 Samples OpenBenchmarking.org Seconds, Fewer Is Better Smallpt 1.0 Global Illumination Renderer; 100 Samples LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 40 80 120 160 200 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 176 162 20 20 1. (CXX) g++ options: -fopenmp -O3 -march=corei7-avx
Open FMM Nero2D Total Time OpenBenchmarking.org Seconds, Fewer Is Better Open FMM Nero2D 2.0.2 Total Time LLVM-Clang 3.1 SVN GCC 4.7.0 GCC 4.6.3 120 240 360 480 600 546.24 543.94 557.09 -O2 -lquadmath -O3 -march=corei7-avx -O3 -march=corei7-avx 1. (CXX) g++ options: -lfftw3 -llapack -lblas -lgfortran -lm
FFmpeg AVI To NTSC VCD OpenBenchmarking.org Seconds, Fewer Is Better FFmpeg 0.10 AVI To NTSC VCD LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 3 6 9 12 15 SE +/- 0.03, N = 3 SE +/- 0.02, N = 3 SE +/- 0.01, N = 3 SE +/- 0.05, N = 3 12.17 12.39 12.32 12.42 1. (CC) gcc options: -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lasound -lSDL -lm -pthread -lbz2
Ogg Encoding WAV To Ogg OpenBenchmarking.org Seconds, Fewer Is Better Ogg Encoding 1.3.0 WAV To Ogg LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 3 6 9 12 15 SE +/- 0.02, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 9.49 9.46 9.44 9.46 -lvorbis -lvorbis 1. (CC) gcc options: -O2 -ffast-math -fsigned-char -O3 -march=corei7-avx -lm -logg
LZMA Compression 256MB File Compression OpenBenchmarking.org Seconds, Fewer Is Better LZMA Compression 256MB File Compression LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 40 80 120 160 200 SE +/- 0.33, N = 3 SE +/- 0.74, N = 3 SE +/- 0.21, N = 3 SE +/- 0.19, N = 3 160.86 163.40 154.97 155.29 1. (CC) gcc options: -O3 -march=corei7-avx
C-Ray Total Time OpenBenchmarking.org Seconds, Fewer Is Better C-Ray 1.1 Total Time LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 8 16 24 32 40 SE +/- 0.05, N = 3 SE +/- 0.13, N = 3 SE +/- 0.13, N = 3 SE +/- 0.32, N = 3 32.40 35.38 25.92 34.01 1. (CC) gcc options: -lm -lpthread -O3 -march=corei7-avx
Timed HMMer Search Pfam Database Search OpenBenchmarking.org Seconds, Fewer Is Better Timed HMMer Search 2.3.2 Pfam Database Search LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 3 6 9 12 15 SE +/- 0.02, N = 3 SE +/- 0.04, N = 3 SE +/- 0.04, N = 3 SE +/- 0.05, N = 3 10.34 10.61 9.22 9.17 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lhmmer -lsquid -lm
Himeno Benchmark Poisson Pressure Solver OpenBenchmarking.org MFLOPS, More Is Better Himeno Benchmark 3.0 Poisson Pressure Solver LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 300 600 900 1200 1500 SE +/- 0.67, N = 3 SE +/- 3.11, N = 3 SE +/- 1.59, N = 3 SE +/- 4.37, N = 3 1280.03 1275.17 1322.56 1270.05 1. (CC) gcc options: -O3 -march=corei7-avx
BYTE Unix Benchmark Computational Test: Dhrystone 2 OpenBenchmarking.org LPS, More Is Better BYTE Unix Benchmark 3.6 Computational Test: Dhrystone 2 LLVM-Clang 3.1 SVN GCC 4.7.0 GCC 4.6.3 5M 10M 15M 20M 25M SE +/- 13587.80, N = 3 SE +/- 12258.65, N = 3 SE +/- 15381.71, N = 3 21549720.13 21265475.60 21842507.83 -march=corei7-avx -march=corei7-avx 1. (CC) gcc options: -O3
GraphicsMagick Operation: Sharpen OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: Sharpen LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 20 40 60 80 100 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 29 20 98 98 -ljpeg -ljpeg -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
GraphicsMagick Operation: Resizing OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: Resizing LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 30 60 90 120 150 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 86 66 152 151 -ljpeg -ljpeg -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
GraphicsMagick Operation: Local Adaptive Thresholding OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: Local Adaptive Thresholding LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 20 40 60 80 100 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 25 21 85 85 -ljpeg -ljpeg -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
GraphicsMagick Operation: HWB Color Space OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: HWB Color Space LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 40 80 120 160 200 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 100 100 163 162 -ljpeg -ljpeg -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
GraphicsMagick Operation: Blur OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: Blur LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 30 60 90 120 150 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 65 72 123 123 -ljpeg -ljpeg -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
VP8 libvpx Encoding vpxenc OpenBenchmarking.org Frames Per Second, More Is Better VP8 libvpx Encoding 0.9.7-p1 vpxenc LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 6 12 18 24 30 SE +/- 0.15, N = 3 SE +/- 0.05, N = 3 SE +/- 0.17, N = 3 SE +/- 0.17, N = 3 22.00 21.46 23.28 23.86 1. (CC) gcc options: -m64 -lvpx -lm -lpthread
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