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&grw&sor .
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 GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN 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 GCC 4.6.3 ext4 1920x1080 GCC 4.7.0 Clang 3.0 + LLVM 3.0 Clang 3.1 (SVN 153339) + LLVM 3.1svn OpenBenchmarking.org Compiler Details - GCC 4.6.3: --enable-checking=release --enable-languages=c,c++ - GCC 4.7.0: --enable-checking=release --enable-languages=c,c++ - LLVM-Clang 3.0: Optimized build; Built Mar 23 2012 (11:30:39); Host: x86_64-unknown-linux-gnu; Host CPU: corei7-avx - 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 System Details - Compiz was running on this system.
GCC 4.7 LLVM Clang 3.1 Compiler Performance encode-ogg: WAV To Ogg hmmer: Pfam Database Search nero2d: Total Time compress-lzma: 256MB File Compression himeno: Poisson Pressure Solver vpxenc: vpxenc graphics-magick: Blur graphics-magick: HWB Color Space graphics-magick: Local Adaptive Thresholding graphics-magick: Resizing graphics-magick: Sharpen c-ray: Total Time ffmpeg: AVI To NTSC VCD smallpt: Global Illumination Renderer; 100 Samples byte: Dhrystone 2 GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN 9.46 9.17 557.09 155.29 1270.05 23.86 123 162 85 151 98 34.01 12.42 20 21842507.83 9.44 9.22 543.94 154.97 1322.56 23.28 123 163 85 152 98 25.92 12.32 20 21265475.60 9.46 10.61 163.40 1275.17 21.46 72 100 21 66 20 35.38 12.39 162 9.49 10.34 546.24 160.86 1280.03 22.00 65 100 25 86 29 32.40 12.17 176 21549720.13 OpenBenchmarking.org
Ogg Encoding WAV To Ogg OpenBenchmarking.org Seconds, Fewer Is Better Ogg Encoding 1.3.0 WAV To Ogg GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN 3 6 9 12 15 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.01, N = 5 SE +/- 0.02, N = 5 9.44 9.46 9.46 9.49 -lvorbis -lvorbis 1. (CC) gcc options: -O2 -ffast-math -fsigned-char -O3 -march=corei7-avx -lm -logg
Timed HMMer Search Pfam Database Search OpenBenchmarking.org Seconds, Fewer Is Better Timed HMMer Search 2.3.2 Pfam Database Search GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 3 6 9 12 15 SE +/- 0.05, N = 3 SE +/- 0.04, N = 3 SE +/- 0.02, N = 3 SE +/- 0.04, N = 3 9.17 9.22 10.34 10.61 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lhmmer -lsquid -lm
Open FMM Nero2D Total Time OpenBenchmarking.org Seconds, Fewer Is Better Open FMM Nero2D 2.0.2 Total Time GCC 4.7.0 LLVM-Clang 3.1 SVN GCC 4.6.3 120 240 360 480 600 543.94 546.24 557.09 -O3 -march=corei7-avx -O2 -lquadmath -O3 -march=corei7-avx 1. (CXX) g++ options: -lfftw3 -llapack -lblas -lgfortran -lm
LZMA Compression 256MB File Compression OpenBenchmarking.org Seconds, Fewer Is Better LZMA Compression 256MB File Compression GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 40 80 120 160 200 SE +/- 0.21, N = 3 SE +/- 0.19, N = 3 SE +/- 0.33, N = 3 SE +/- 0.74, N = 3 154.97 155.29 160.86 163.40 1. (CC) gcc options: -O3 -march=corei7-avx
Himeno Benchmark Poisson Pressure Solver OpenBenchmarking.org MFLOPS, More Is Better Himeno Benchmark 3.0 Poisson Pressure Solver GCC 4.7.0 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.6.3 300 600 900 1200 1500 SE +/- 1.59, N = 3 SE +/- 0.67, N = 3 SE +/- 3.11, N = 3 SE +/- 4.37, N = 3 1322.56 1280.03 1275.17 1270.05 1. (CC) gcc options: -O3 -march=corei7-avx
VP8 libvpx Encoding vpxenc OpenBenchmarking.org Frames Per Second, More Is Better VP8 libvpx Encoding 0.9.7-p1 vpxenc GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 6 12 18 24 30 SE +/- 0.17, N = 3 SE +/- 0.17, N = 3 SE +/- 0.15, N = 3 SE +/- 0.05, N = 3 23.86 23.28 22.00 21.46 1. (CC) gcc options: -m64 -lvpx -lm -lpthread
GraphicsMagick Operation: Blur OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: Blur GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN 30 60 90 120 150 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 123 123 72 65 -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -ljpeg -ljpeg 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 GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 40 80 120 160 200 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 163 162 100 100 -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -ljpeg -ljpeg 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 GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 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 85 85 25 21 -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -ljpeg -ljpeg 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 GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 30 60 90 120 150 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 152 151 86 66 -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -ljpeg -ljpeg 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
GraphicsMagick Operation: Sharpen OpenBenchmarking.org Iterations Per Minute, More Is Better GraphicsMagick 1.3.12 Operation: Sharpen GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 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 98 98 29 20 -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -std=gnu99 -fopenmp -ltiff -lfreetype -lrt -ljpeg -ljpeg 1. (CC) gcc options: -O3 -march=corei7-avx -pthread -lXext -lSM -lICE -lX11 -lbz2 -lz -lm -lpthread
C-Ray Total Time OpenBenchmarking.org Seconds, Fewer Is Better C-Ray 1.1 Total Time GCC 4.7.0 LLVM-Clang 3.1 SVN GCC 4.6.3 LLVM-Clang 3.0 8 16 24 32 40 SE +/- 0.13, N = 3 SE +/- 0.05, N = 3 SE +/- 0.32, N = 3 SE +/- 0.13, N = 3 25.92 32.40 34.01 35.38 1. (CC) gcc options: -lm -lpthread -O3 -march=corei7-avx
FFmpeg AVI To NTSC VCD OpenBenchmarking.org Seconds, Fewer Is Better FFmpeg 0.10 AVI To NTSC VCD LLVM-Clang 3.1 SVN GCC 4.7.0 LLVM-Clang 3.0 GCC 4.6.3 3 6 9 12 15 SE +/- 0.03, N = 3 SE +/- 0.01, N = 3 SE +/- 0.02, N = 3 SE +/- 0.05, N = 3 12.17 12.32 12.39 12.42 1. (CC) gcc options: -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lasound -lSDL -lm -pthread -lbz2
Smallpt Global Illumination Renderer; 100 Samples OpenBenchmarking.org Seconds, Fewer Is Better Smallpt 1.0 Global Illumination Renderer; 100 Samples GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN 40 80 120 160 200 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.33, N = 3 SE +/- 0.00, N = 3 20 20 162 176 1. (CXX) g++ options: -fopenmp -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 GCC 4.6.3 LLVM-Clang 3.1 SVN GCC 4.7.0 5M 10M 15M 20M 25M SE +/- 15381.71, N = 3 SE +/- 13587.80, N = 3 SE +/- 12258.65, N = 3 21842507.83 21549720.13 21265475.60 -march=corei7-avx -march=corei7-avx 1. (CC) gcc options: -O3
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