GCC 4.9 vs. LLVM Clang 3.5 Linux Compiler Benchmarks

Some early compiler benchmarks of LLVM Clang 3.5 SVN against GCC 4.9.0 RC1 on Ubuntu 14.04 LTS with the Linux 3.13 kernel and using an Intel Core i7 4770K Haswell system. Benchmarks by Michael Larabel for a future article on Phoronix.com.

HTML result view exported from: https://openbenchmarking.org/result/1404144-KH-CLANG359076&sor&gru.

GCC 4.9 vs. LLVM Clang 3.5 Linux Compiler BenchmarksProcessorMotherboardChipsetMemoryDiskGraphicsAudioMonitorNetworkOSKernelDesktopDisplay ServerDisplay DriverOpenGLCompilerFile-SystemScreen ResolutionGCC 4.8.2GCC 4.9.0 RC1LLVM Clang 3.5 20140413Intel Core i7-4770K @ 3.50GHz (8 Cores)ECS Z87H3-A2X EXTREME v1.0Intel 4th Gen Core DRAM16384MB120GB Samsung SSD 840ECS NVIDIA GeForce GTX 460 768MB (675/1804MHz)Realtek ALC1150Samsung SyncMasterRealtek RTL8111/8168/8411Ubuntu 14.043.13.0-22-generic (x86_64)Unity 7.2.0X Server 1.15.0NVIDIA 337.124.3.0GCC 4.8.2ext42560x1600GCC 4.9.0 20140411Clang 3.5.0-1~exp1OpenBenchmarking.orgCompiler Details- GCC 4.8.2, GCC 4.9.0 RC1: --enable-checking=releaseProcessor Details- Scaling Governor: acpi-cpufreq ondemand

GCC 4.9 vs. LLVM Clang 3.5 Linux Compiler Benchmarksgraphics-magick: Blurgraphics-magick: Sharpengraphics-magick: Resizinggraphics-magick: HWB Color Spacegraphics-magick: Local Adaptive Thresholdinghimeno: Poisson Pressure Solverhint: FLOATapache: Static Web Page Servingebizzy: Records/sbuild-apache: Time To Compilebuild-imagemagick: Time To Compilebuild-php: Time To Compilec-ray: Total Timesmallpt: Global Illumination Renderer; 100 Samplesencode-flac: WAV To FLACencode-mp3: WAV To MP3ffmpeg: H.264 HD To NTSC DVGCC 4.8.2GCC 4.9.0 RC1LLVM Clang 3.5 20140413170140198216971810.10367476347.0035904.534284927.1460.3526.2716.98244.8212.4213.991661401992141021828.15373674384.8335953.734295027.8860.5927.0517.093.7010.8713.80876195155941954.26237448328.6736432.044320218.0029.6116.2525.841344.2313.4913.89OpenBenchmarking.org

GraphicsMagick

Operation: Blur

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: BlurGCC 4.8.2GCC 4.9.0 RC1LLVM Clang 3.5 201404134080120160200SE +/- 0.33, N = 3SE +/- 0.33, N = 3SE +/- 0.33, N = 317016687-std=gnu99 -fopenmp-std=gnu99 -fopenmp1. (CC) gcc options: -O3 -march=native -pthread -ljbig -lwebp -ljpeg -lXext -lX11 -llzma -lxml2 -lz -lm -lpthread

GraphicsMagick

Operation: Sharpen

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: SharpenGCC 4.9.0 RC1GCC 4.8.2LLVM Clang 3.5 20140413306090120150SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.33, N = 314014061-std=gnu99 -fopenmp-std=gnu99 -fopenmp1. (CC) gcc options: -O3 -march=native -pthread -ljbig -lwebp -ljpeg -lXext -lX11 -llzma -lxml2 -lz -lm -lpthread

GraphicsMagick

Operation: Resizing

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: ResizingGCC 4.9.0 RC1GCC 4.8.2LLVM Clang 3.5 201404134080120160200SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.00, N = 319919895-std=gnu99 -fopenmp-std=gnu99 -fopenmp1. (CC) gcc options: -O3 -march=native -pthread -ljbig -lwebp -ljpeg -lXext -lX11 -llzma -lxml2 -lz -lm -lpthread

GraphicsMagick

Operation: HWB Color Space

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: HWB Color SpaceGCC 4.8.2GCC 4.9.0 RC1LLVM Clang 3.5 2014041350100150200250SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.33, N = 3216214155-std=gnu99 -fopenmp-std=gnu99 -fopenmp1. (CC) gcc options: -O3 -march=native -pthread -ljbig -lwebp -ljpeg -lXext -lX11 -llzma -lxml2 -lz -lm -lpthread

GraphicsMagick

Operation: Local Adaptive Thresholding

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: Local Adaptive ThresholdingGCC 4.9.0 RC1GCC 4.8.2LLVM Clang 3.5 2014041320406080100SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.33, N = 31029794-std=gnu99 -fopenmp-std=gnu99 -fopenmp1. (CC) gcc options: -O3 -march=native -pthread -ljbig -lwebp -ljpeg -lXext -lX11 -llzma -lxml2 -lz -lm -lpthread

Himeno Benchmark

Poisson Pressure Solver

OpenBenchmarking.orgMFLOPS, More Is BetterHimeno Benchmark 3.0Poisson Pressure SolverLLVM Clang 3.5 20140413GCC 4.9.0 RC1GCC 4.8.2400800120016002000SE +/- 12.20, N = 3SE +/- 1.31, N = 3SE +/- 3.93, N = 31954.261828.151810.101. (CC) gcc options: -O3 -march=native

Hierarchical INTegration

Test: FLOAT

OpenBenchmarking.orgQUIPs, More Is BetterHierarchical INTegration 1.0Test: FLOATGCC 4.9.0 RC1GCC 4.8.2LLVM Clang 3.5 2014041380M160M240M320M400MSE +/- 362392.17, N = 3SE +/- 103032.27, N = 3SE +/- 938522.38, N = 3373674384.83367476347.00237448328.671. (CC) gcc options: -O3 -march=native -lm

Apache Benchmark

Static Web Page Serving

OpenBenchmarking.orgRequests Per Second, More Is BetterApache Benchmark 2.4.7Static Web Page ServingLLVM Clang 3.5 20140413GCC 4.9.0 RC1GCC 4.8.28K16K24K32K40KSE +/- 73.90, N = 3SE +/- 76.61, N = 3SE +/- 136.25, N = 336432.0435953.7335904.531. (CC) gcc options: -shared -fPIC -pthread -O3 -march=native

ebizzy

Records/s

OpenBenchmarking.orgSeconds, More Is Betterebizzy 0.3Records/sLLVM Clang 3.5 20140413GCC 4.9.0 RC1GCC 4.8.29K18K27K36K45KSE +/- 53.03, N = 3SE +/- 44.08, N = 3SE +/- 109.85, N = 34320242950428491. (CC) gcc options: -pthread -lpthread -O3 -march=native

Timed Apache Compilation

Time To Compile

OpenBenchmarking.orgSeconds, Fewer Is BetterTimed Apache Compilation 2.4.7Time To CompileLLVM Clang 3.5 20140413GCC 4.8.2GCC 4.9.0 RC1714212835SE +/- 0.05, N = 3SE +/- 0.19, N = 3SE +/- 0.23, N = 318.0027.1427.88

Timed ImageMagick Compilation

Time To Compile

OpenBenchmarking.orgSeconds, Fewer Is BetterTimed ImageMagick Compilation 6.8.1-10Time To CompileLLVM Clang 3.5 20140413GCC 4.8.2GCC 4.9.0 RC11428425670SE +/- 0.14, N = 3SE +/- 0.36, N = 3SE +/- 0.04, N = 329.6160.3560.59

Timed PHP Compilation

Time To Compile

OpenBenchmarking.orgSeconds, Fewer Is BetterTimed PHP Compilation 5.2.9Time To CompileLLVM Clang 3.5 20140413GCC 4.8.2GCC 4.9.0 RC1612182430SE +/- 0.03, N = 3SE +/- 0.08, N = 3SE +/- 0.02, N = 316.2526.2727.051. (CC) gcc options: -O3 -march=native -pedantic -ldl -lz -lm

C-Ray

Total Time

OpenBenchmarking.orgSeconds, Fewer Is BetterC-Ray 1.1Total TimeGCC 4.8.2GCC 4.9.0 RC1LLVM Clang 3.5 20140413612182430SE +/- 0.01, N = 3SE +/- 0.01, N = 3SE +/- 0.00, N = 316.9817.0925.841. (CC) gcc options: -lm -lpthread -O3 -march=native

Smallpt

Global Illumination Renderer; 100 Samples

OpenBenchmarking.orgSeconds, Fewer Is BetterSmallpt 1.0Global Illumination Renderer; 100 SamplesGCC 4.8.2LLVM Clang 3.5 20140413306090120150SE +/- 0.00, N = 3SE +/- 0.67, N = 3241341. (CXX) g++ options: -fopenmp -O3 -march=native

FLAC Audio Encoding

WAV To FLAC

OpenBenchmarking.orgSeconds, Fewer Is BetterFLAC Audio Encoding 1.3.0WAV To FLACGCC 4.9.0 RC1LLVM Clang 3.5 20140413GCC 4.8.21.08452.1693.25354.3385.4225SE +/- 0.09, N = 10SE +/- 0.01, N = 5SE +/- 0.06, N = 73.704.234.821. (CXX) g++ options: -O3 -march=native -fvisibility=hidden -logg -lm

LAME MP3 Encoding

WAV To MP3

OpenBenchmarking.orgSeconds, Fewer Is BetterLAME MP3 Encoding 3.99.3WAV To MP3GCC 4.9.0 RC1GCC 4.8.2LLVM Clang 3.5 201404133691215SE +/- 0.01, N = 5SE +/- 0.04, N = 5SE +/- 0.04, N = 510.8712.4213.491. (CC) gcc options: -pipe -O3 -march=native -lm

FFmpeg

H.264 HD To NTSC DV

OpenBenchmarking.orgSeconds, Fewer Is BetterFFmpeg 2.1.1H.264 HD To NTSC DVGCC 4.9.0 RC1LLVM Clang 3.5 20140413GCC 4.8.248121620SE +/- 0.01, N = 3SE +/- 0.12, N = 3SE +/- 0.03, N = 313.8013.8913.99-fno-tree-vectorize -MF -MT-Qunused-arguments-fno-tree-vectorize -MF -MT1. (CC) gcc options: -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lasound -lSDL -lm -pthread -O3 -march=native -std=c99 -fomit-frame-pointer -fno-math-errno -fno-signed-zeros -MMD


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