LLVM Clang 3.1 GCC 4.7 Intel Core i7 Benchmarks Benchmarking of GCC 4.6.3, GCC 4.7.0, LLVM Clang 3.0, and LLVM Clang 3.1 SVN compilers for a future article on Phoronix.com. Compilers built all test binaries with CFLAGS/CXXFLAGS of -O3 -march=native from this Intel Core i7 Clarksfield notebook. Ubuntu 12.04 LTS x86_64 was used with the Linux 3.2 kernel.
HTML result view exported from: https://openbenchmarking.org/result/1204215-SU-LLVMCLANG23&gru&sor .
LLVM Clang 3.1 GCC 4.7 Intel Core i7 Benchmarks Processor Motherboard Chipset Memory Disk Graphics Audio 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 Open64 5.0 Intel Core i7 720Q @ 1.60GHz (8 Cores) LENOVO 4318CTO Intel Core DMI 4096MB 160GB INTEL SSDSA2M160 NVIDIA Quadro FX 880M 1024MB (405/324MHz) Conexant CX20585 Intel 82577LM Gigabit Connection + Intel Centrino Ultimate-N 6300 Ubuntu 12.04 3.4.0-999-generic (x86_64) Unity 5.10.0 X Server 1.11.3 nouveau 0.0.16 2.1 Mesa 8.0.2 Gallium 0.4 GCC 4.6.3 ext4 1600x900 GCC 4.7.0 Clang 3.0 + LLVM 3.0 Clang 3.1 (SVN 155295) + LLVM 3.1svn Open64 5.0 OpenBenchmarking.org Compiler Details - GCC 4.6.3: --enable-checking=release --enable-languages=c,c++ --enable-lto - GCC 4.7.0: --enable-checking=release --enable-languages=c,c++ --enable-lto - LLVM-Clang 3.0: Optimized build; Built Apr 21 2012 (12:40:14); Host: x86_64-unknown-linux-gnu; Host CPU: corei7 - LLVM-Clang 3.1 SVN: Optimized build; Built Apr 21 2012 (14:54:30); Default target: x86_64-unknown-linux-gnu; Host CPU: corei7 Processor Details - Scaling Governor: ondemand System Details - Compiz was running on this system.
LLVM Clang 3.1 GCC 4.7 Intel Core i7 Benchmarks ttsiod-renderer: Phong Rendering With Soft-Shadow Mapping vpxenc: vpxenc x264: H.264 Video Encoding gmpbench: Total Time fhourstones: Complex Connect-4 Solving byte: Dhrystone 2 ffte: N=64, 1D Complex FFT Routine himeno: Poisson Pressure Solver compress-7zip: Compress Speed Test john-the-ripper: Blowfish nginx: Static Web Page Serving apache: Static Web Page Serving openssl: RSA 4096-bit Performance pgbench: TPC-B Transactions Per Second hmmer: Pfam Database Search mafft: Multiple Sequence Alignment mrbayes: Primate Phylogeny Analysis build-php: Time To Compile c-ray: Total Time compress-pbzip2: 256MB File Compression smallpt: Global Illumination Renderer; 100 Samples crafty: Elapsed Time encode-flac: WAV To FLAC encode-mp3: WAV To MP3 ffmpeg: AVI To NTSC VCD minion: Bibd minion: Graceful minion: Solitaire minion: Quasigroup nero2d: Total Time tachyon: Total Time GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN Open64 5.0 63.32 9.93 58.46 1739 8643.40 18737961.27 3276.19 1060.59 8849 2215 15482.08 14290.99 42.23 2375.18 26.52 13.73 37.07 50.42 139.01 19.34 69 109.88 9.97 23.58 15.87 206.67 111.35 203.00 255.83 640.17 36.05 59.50 9.76 58.26 1751.20 8631.43 18075520.17 3156.92 1142.97 8890 2211 14956.30 14322.05 42.08 2405.91 26.63 13.60 32.38 54.74 91.18 22.30 68 108.29 9.32 23.10 15.73 217.34 122.41 211.57 253.16 638.60 37.21 3270.19 1002.87 9108 15559.96 14867.10 33.02 16.14 118.20 234 223.86 110.30 224.90 277.69 9.07 8551.90 3197.68 1053.29 9166 662 15767.21 14834.66 42.08 2426.91 32.63 14.73 40.09 47.49 109.11 23.21 251 107.85 10.85 23.81 16.09 219.58 110.04 217.96 262.50 36.17 3267.81 OpenBenchmarking.org
TTSIOD 3D Renderer Phong Rendering With Soft-Shadow Mapping OpenBenchmarking.org FPS, More Is Better TTSIOD 3D Renderer 2.2w Phong Rendering With Soft-Shadow Mapping GCC 4.6.3 GCC 4.7.0 14 28 42 56 70 SE +/- 0.04, N = 3 SE +/- 0.12, N = 3 63.32 59.50 1. (CXX) g++ options: -O3 -march=native -fomit-frame-pointer -ffast-math -mtune=native -flto -msse -mrecip -mfpmath=sse -msse2 -mssse3 -lSDL -lstdc++
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 3 6 9 12 15 SE +/- 0.09, N = 3 SE +/- 0.07, N = 3 SE +/- 0.06, N = 3 9.93 9.76 9.07 1. (CC) gcc options: -m64 -lvpx -lm -lpthread
x264 H.264 Video Encoding OpenBenchmarking.org Frames Per Second, More Is Better x264 2011-12-06 H.264 Video Encoding GCC 4.6.3 GCC 4.7.0 13 26 39 52 65 SE +/- 0.05, N = 3 SE +/- 0.12, N = 3 58.46 58.26
GMPbench Total Time OpenBenchmarking.org GMPbench Score, More Is Better GMPbench 0.2 Total Time GCC 4.7.0 GCC 4.6.3 400 800 1200 1600 2000 1751.20 1739.00 1. (CC) gcc options: -O3 -march=native
Fhourstones Complex Connect-4 Solving OpenBenchmarking.org Kpos / sec, More Is Better Fhourstones 3.1 Complex Connect-4 Solving GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN 2K 4K 6K 8K 10K SE +/- 22.37, N = 3 SE +/- 5.11, N = 3 SE +/- 5.30, N = 3 8643.40 8631.43 8551.90 1. (CC) gcc options: -O3
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 GCC 4.7.0 4M 8M 12M 16M 20M SE +/- 36800.75, N = 3 SE +/- 14064.68, N = 3 18737961.27 18075520.17 1. (CC) gcc options: -O3 -march=native
FFTE Test: N=64, 1D Complex FFT Routine OpenBenchmarking.org MFLOPS, More Is Better FFTE 5.0 Test: N=64, 1D Complex FFT Routine GCC 4.6.3 LLVM-Clang 3.0 Open64 5.0 LLVM-Clang 3.1 SVN GCC 4.7.0 700 1400 2100 2800 3500 SE +/- 11.98, N = 3 SE +/- 7.30, N = 3 SE +/- 6.76, N = 3 SE +/- 29.94, N = 3 SE +/- 48.14, N = 3 3276.19 3270.19 3267.81 3197.68 3156.92 1. (F9X) gfortran options: -O3 -fomit-frame-pointer -fopenmp -pthread -lmpi_f90 -lmpi_f77 -lmpi -lopen-rte -lopen-pal -ldl -lnsl -lutil -lm
Himeno Benchmark Poisson Pressure Solver OpenBenchmarking.org MFLOPS, More Is Better Himeno Benchmark 3.0 Poisson Pressure Solver GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 200 400 600 800 1000 SE +/- 2.04, N = 3 SE +/- 16.23, N = 3 SE +/- 9.10, N = 3 SE +/- 5.12, N = 3 1142.97 1060.59 1053.29 1002.87 1. (CC) gcc options: -O3 -march=native
7-Zip Compression Compress Speed Test OpenBenchmarking.org MIPS, More Is Better 7-Zip Compression 9.20.1 Compress Speed Test LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.7.0 GCC 4.6.3 2K 4K 6K 8K 10K SE +/- 7.55, N = 3 SE +/- 11.50, N = 3 SE +/- 42.67, N = 3 SE +/- 65.12, N = 3 9166 9108 8890 8849 1. (CXX) g++ options: -pipe -lpthread
John The Ripper Test: Blowfish OpenBenchmarking.org Real C/S, More Is Better John The Ripper 1.7.9 Test: Blowfish GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN 500 1000 1500 2000 2500 SE +/- 1.67, N = 3 SE +/- 1.67, N = 3 SE +/- 1.53, N = 3 2215 2211 662 1. (CC) gcc options: -fopenmp -lcrypt
NGINX Benchmark Static Web Page Serving OpenBenchmarking.org Requests Per Second, More Is Better NGINX Benchmark 1.0.11 Static Web Page Serving LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.6.3 GCC 4.7.0 3K 6K 9K 12K 15K SE +/- 141.05, N = 3 SE +/- 184.13, N = 3 SE +/- 89.02, N = 3 SE +/- 54.72, N = 3 15767.21 15559.96 15482.08 14956.30 1. (CC) gcc options: -lpthread -lcrypt -lcrypto -lz
Apache Benchmark Static Web Page Serving OpenBenchmarking.org Requests Per Second, More Is Better Apache Benchmark 2.2.21 Static Web Page Serving LLVM-Clang 3.0 LLVM-Clang 3.1 SVN GCC 4.7.0 GCC 4.6.3 3K 6K 9K 12K 15K SE +/- 62.06, N = 3 SE +/- 131.26, N = 3 SE +/- 59.62, N = 3 SE +/- 14.58, N = 3 14867.10 14834.66 14322.05 14290.99 1. (CC) gcc options: -pthread -O3 -march=native -lm -lexpat -lrt -lcrypt -lpthread -ldl
OpenSSL RSA 4096-bit Performance OpenBenchmarking.org Signs Per Second, More Is Better OpenSSL 1.0.0e RSA 4096-bit Performance GCC 4.6.3 LLVM-Clang 3.1 SVN GCC 4.7.0 10 20 30 40 50 SE +/- 0.10, N = 4 SE +/- 0.05, N = 4 SE +/- 0.03, N = 4 42.23 42.08 42.08 1. (CC) gcc options: -m64 -O3 -lssl -lcrypto -ldl
PostgreSQL pgbench TPC-B Transactions Per Second OpenBenchmarking.org TPS, More Is Better PostgreSQL pgbench 8.4.11 TPC-B Transactions Per Second LLVM-Clang 3.1 SVN GCC 4.7.0 GCC 4.6.3 500 1000 1500 2000 2500 SE +/- 16.75, N = 3 SE +/- 10.83, N = 3 SE +/- 12.24, N = 3 2426.91 2405.91 2375.18 1. (CC) gcc options: -O3 -march=native -fno-strict-aliasing -fwrapv -lpgport -lpq -lcrypt -ldl -lm
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 8 16 24 32 40 SE +/- 0.03, N = 3 SE +/- 0.01, N = 3 SE +/- 0.06, N = 3 SE +/- 0.04, N = 3 26.52 26.63 32.63 33.02 1. (CC) gcc options: -O3 -march=native -pthread -lhmmer -lsquid -lm
Timed MAFFT Alignment Multiple Sequence Alignment OpenBenchmarking.org Seconds, Fewer Is Better Timed MAFFT Alignment 6.864 Multiple Sequence Alignment GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 4 8 12 16 20 SE +/- 0.04, N = 3 SE +/- 0.18, N = 6 SE +/- 0.07, N = 3 SE +/- 0.28, N = 4 13.60 13.73 14.73 16.14 1. (CC) gcc options: -O3 -lm -lpthread
Timed MrBayes Analysis Primate Phylogeny Analysis OpenBenchmarking.org Seconds, Fewer Is Better Timed MrBayes Analysis 3.1.2 Primate Phylogeny Analysis GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN 9 18 27 36 45 SE +/- 0.09, N = 3 SE +/- 0.03, N = 3 SE +/- 0.25, N = 3 32.38 37.07 40.09
Timed PHP Compilation Time To Compile OpenBenchmarking.org Seconds, Fewer Is Better Timed PHP Compilation 5.2.9 Time To Compile LLVM-Clang 3.1 SVN GCC 4.6.3 GCC 4.7.0 12 24 36 48 60 SE +/- 0.06, N = 3 SE +/- 0.07, N = 3 SE +/- 0.05, N = 3 47.49 50.42 54.74 -lpthread 1. (CC) gcc options: -O3 -march=native -pedantic -ldl -lz -lm
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 LLVM-Clang 3.0 GCC 4.6.3 30 60 90 120 150 SE +/- 3.00, N = 6 SE +/- 4.36, N = 6 SE +/- 3.60, N = 6 SE +/- 12.48, N = 6 91.18 109.11 118.20 139.01 1. (CC) gcc options: -lm -lpthread -O3 -march=native
Parallel BZIP2 Compression 256MB File Compression OpenBenchmarking.org Seconds, Fewer Is Better Parallel BZIP2 Compression 1.0.5 256MB File Compression GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN 6 12 18 24 30 SE +/- 0.05, N = 3 SE +/- 0.03, N = 3 SE +/- 0.03, N = 3 19.34 22.30 23.21 1. (CXX) g++ options: -O2 -pthread -lpthread -lbz2
Smallpt Global Illumination Renderer; 100 Samples OpenBenchmarking.org Seconds, Fewer Is Better Smallpt 1.0 Global Illumination Renderer; 100 Samples GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.0 LLVM-Clang 3.1 SVN 50 100 150 200 250 SE +/- 0.00, N = 3 SE +/- 0.00, N = 3 SE +/- 0.33, N = 3 SE +/- 0.67, N = 3 68 69 234 251 1. (CXX) g++ options: -fopenmp -O3 -march=native
Crafty Elapsed Time OpenBenchmarking.org Seconds, Fewer Is Better Crafty 23.4 Elapsed Time LLVM-Clang 3.1 SVN GCC 4.7.0 GCC 4.6.3 20 40 60 80 100 SE +/- 0.06, N = 3 SE +/- 0.05, N = 3 SE +/- 0.11, N = 3 107.85 108.29 109.88 1. (CC) gcc options: -lstdc++ -lm
FLAC Audio Encoding WAV To FLAC OpenBenchmarking.org Seconds, Fewer Is Better FLAC Audio Encoding 1.2.1 WAV To FLAC GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN 3 6 9 12 15 SE +/- 0.02, N = 5 SE +/- 0.01, N = 5 SE +/- 0.02, N = 5 9.32 9.97 10.85 1. (CXX) g++ options: -O3 -march=native -lm
LAME MP3 Encoding WAV To MP3 OpenBenchmarking.org Seconds, Fewer Is Better LAME MP3 Encoding 3.99.3 WAV To MP3 GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN 6 12 18 24 30 SE +/- 0.02, N = 5 SE +/- 0.04, N = 5 SE +/- 0.04, N = 5 23.10 23.58 23.81
FFmpeg AVI To NTSC VCD OpenBenchmarking.org Seconds, Fewer Is Better FFmpeg 0.10 AVI To NTSC VCD GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN 4 8 12 16 20 SE +/- 0.02, N = 3 SE +/- 0.01, N = 3 SE +/- 0.01, N = 3 15.73 15.87 16.09 1. (CC) gcc options: -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lasound -lSDL -lm -pthread -lbz2
Minion Benchmark: Bibd OpenBenchmarking.org Seconds, Fewer Is Better Minion 0.12 Benchmark: Bibd GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 50 100 150 200 250 SE +/- 0.63, N = 3 SE +/- 0.27, N = 3 SE +/- 0.37, N = 3 SE +/- 0.43, N = 3 206.67 217.34 219.58 223.86 -mdynamic-no-pic -lz -lbz2 -mdynamic-no-pic -lz -lbz2 1. (CXX) g++ options: -O3 -fomit-frame-pointer -rdynamic -lboost_iostreams-mt
Minion Benchmark: Graceful OpenBenchmarking.org Seconds, Fewer Is Better Minion 0.12 Benchmark: Graceful LLVM-Clang 3.1 SVN LLVM-Clang 3.0 GCC 4.6.3 GCC 4.7.0 30 60 90 120 150 SE +/- 0.31, N = 3 SE +/- 0.08, N = 3 SE +/- 0.27, N = 3 SE +/- 0.33, N = 3 110.04 110.30 111.35 122.41 -mdynamic-no-pic -lz -lbz2 -mdynamic-no-pic -lz -lbz2 1. (CXX) g++ options: -O3 -fomit-frame-pointer -rdynamic -lboost_iostreams-mt
Minion Benchmark: Solitaire OpenBenchmarking.org Seconds, Fewer Is Better Minion 0.12 Benchmark: Solitaire GCC 4.6.3 GCC 4.7.0 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 50 100 150 200 250 SE +/- 0.36, N = 3 SE +/- 0.22, N = 3 SE +/- 0.41, N = 3 SE +/- 0.44, N = 3 203.00 211.57 217.96 224.90 -mdynamic-no-pic -lz -lbz2 -mdynamic-no-pic -lz -lbz2 1. (CXX) g++ options: -O3 -fomit-frame-pointer -rdynamic -lboost_iostreams-mt
Minion Benchmark: Quasigroup OpenBenchmarking.org Seconds, Fewer Is Better Minion 0.12 Benchmark: Quasigroup GCC 4.7.0 GCC 4.6.3 LLVM-Clang 3.1 SVN LLVM-Clang 3.0 60 120 180 240 300 SE +/- 0.04, N = 3 SE +/- 0.25, N = 3 SE +/- 0.21, N = 3 SE +/- 0.27, N = 3 253.16 255.83 262.50 277.69 -mdynamic-no-pic -lz -lbz2 -mdynamic-no-pic -lz -lbz2 1. (CXX) g++ options: -O3 -fomit-frame-pointer -rdynamic -lboost_iostreams-mt
Open FMM Nero2D Total Time OpenBenchmarking.org Seconds, Fewer Is Better Open FMM Nero2D 2.0.2 Total Time GCC 4.7.0 GCC 4.6.3 140 280 420 560 700 638.60 640.17 1. (CXX) g++ options: -O3 -march=native -lfftw3 -llapack -lblas -lgfortran -lm
Tachyon Total Time OpenBenchmarking.org Seconds, Fewer Is Better Tachyon 0.98.9 Total Time GCC 4.6.3 LLVM-Clang 3.1 SVN GCC 4.7.0 9 18 27 36 45 SE +/- 0.02, N = 3 SE +/- 0.02, N = 3 SE +/- 0.02, N = 3 36.05 36.17 37.21 1. (CC) gcc options: -m32 -O3 -fomit-frame-pointer -ffast-math -ltachyon -lm -lpthread
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