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. ,,"GCC 4.6.3","GCC 4.7.0","LLVM-Clang 3.0","LLVM-Clang 3.1 SVN","Open64 5.0" Processor,,Intel Core i7 720Q @ 1.60GHz (8 Cores),Intel Core i7 720Q @ 1.60GHz (8 Cores),Intel Core i7 720Q @ 1.60GHz (8 Cores),Intel Core i7 720Q @ 1.60GHz (8 Cores),Intel Core i7 720Q @ 1.60GHz (8 Cores) Motherboard,,LENOVO 4318CTO,LENOVO 4318CTO,LENOVO 4318CTO,LENOVO 4318CTO,LENOVO 4318CTO Chipset,,Intel Core DMI,Intel Core DMI,Intel Core DMI,Intel Core DMI,Intel Core DMI Memory,,4096MB,4096MB,4096MB,4096MB,4096MB Disk,,160GB INTEL SSDSA2M160,160GB INTEL SSDSA2M160,160GB INTEL SSDSA2M160,160GB INTEL SSDSA2M160,160GB INTEL SSDSA2M160 Graphics,,NVIDIA Quadro FX 880M 1024MB (405/324MHz),NVIDIA Quadro FX 880M 1024MB (405/324MHz),NVIDIA Quadro FX 880M 1024MB (405/324MHz),NVIDIA Quadro FX 880M 1024MB (405/324MHz),NVIDIA Quadro FX 880M 1024MB (405/324MHz) Audio,,Conexant CX20585,Conexant CX20585,Conexant CX20585,Conexant CX20585,Conexant CX20585 Network,,Intel 82577LM Gigabit Connection + Intel Centrino Ultimate-N 6300,Intel 82577LM Gigabit Connection + Intel Centrino Ultimate-N 6300,Intel 82577LM Gigabit Connection + Intel Centrino Ultimate-N 6300,Intel 82577LM Gigabit Connection + Intel Centrino Ultimate-N 6300,Intel 82577LM Gigabit Connection + Intel Centrino Ultimate-N 6300 OS,,Ubuntu 12.04,Ubuntu 12.04,Ubuntu 12.04,Ubuntu 12.04,Ubuntu 12.04 Kernel,,3.4.0-999-generic (x86_64),3.4.0-999-generic (x86_64),3.4.0-999-generic (x86_64),3.4.0-999-generic (x86_64),3.4.0-999-generic (x86_64) Desktop,,Unity 5.10.0,Unity 5.10.0,Unity 5.10.0,Unity 5.10.0,Unity 5.10.0 Display Server,,X Server 1.11.3,X Server 1.11.3,X Server 1.11.3,X Server 1.11.3,X Server 1.11.3 Display Driver,,nouveau 0.0.16,nouveau 0.0.16,nouveau 0.0.16,nouveau 0.0.16,nouveau 0.0.16 OpenGL,,2.1 Mesa 8.0.2 Gallium 0.4,2.1 Mesa 8.0.2 Gallium 0.4,2.1 Mesa 8.0.2 Gallium 0.4,2.1 Mesa 8.0.2 Gallium 0.4,2.1 Mesa 8.0.2 Gallium 0.4 Compiler,,GCC 4.6.3,GCC 4.7.0,Clang 3.0 + LLVM 3.0,Clang 3.1 (SVN 155295) + LLVM 3.1svn,Open64 5.0 File-System,,ext4,ext4,ext4,ext4,ext4 Screen Resolution,,1600x900,1600x900,1600x900,1600x900,1600x900 ,,"GCC 4.6.3","GCC 4.7.0","LLVM-Clang 3.0","LLVM-Clang 3.1 SVN","Open64 5.0" "Apache Benchmark - Static Web Page Serving (Reqs/sec)",HIB,14290.99,14322.05,14867.10,14834.66, "NGINX Benchmark - Static Web Page Serving (Reqs/sec)",HIB,15482.08,14956.30,15559.96,15767.21, "PostgreSQL pgbench - TPC-B Transactions Per Second (TPS)",HIB,2375.18,2405.91,,2426.91, "OpenSSL - RSA 4096-bit Performance (Signs/sec)",HIB,42.23,42.08,,42.08, "Tachyon - Total Time (sec)",LIB,36.05,37.21,,36.17, "Open FMM Nero2D - Total Time (sec)",LIB,640.17,638.60,,, "Minion - Benchmark: Quasigroup (sec)",LIB,255.83,253.16,277.69,262.50, "Minion - Benchmark: Solitaire (sec)",LIB,203.00,211.57,224.90,217.96, "Minion - Benchmark: Graceful (sec)",LIB,111.35,122.41,110.30,110.04, "Minion - Benchmark: Bibd (sec)",LIB,206.67,217.34,223.86,219.58, "FFmpeg - AVI To NTSC VCD (sec)",LIB,15.87,15.73,,16.09, "LAME MP3 Encoding - WAV To MP3 (sec)",LIB,23.58,23.10,,23.81, "FLAC Audio Encoding - WAV To FLAC (sec)",LIB,9.97,9.32,,10.85, "Crafty - Elapsed Time (sec)",LIB,109.88,108.29,,107.85, "Smallpt - Global Illumination Renderer; 100 Samples (sec)",LIB,69,68,234,251, "Parallel BZIP2 Compression - 256MB File Compression (sec)",LIB,19.34,22.30,,23.21, "C-Ray - Total Time (sec)",LIB,139.01,91.18,118.20,109.11, "Timed PHP Compilation - Time To Compile (sec)",LIB,50.42,54.74,,47.49, "7-Zip Compression - Compress Speed Test (MIPS)",HIB,8849,8890,9108,9166, "Himeno Benchmark - Poisson Pressure Solver (MFLOPS)",HIB,1060.59,1142.97,1002.87,1053.29, "x264 - H.264 Video Encoding (FPS)",HIB,58.46,58.26,,, "VP8 libvpx Encoding - vpxenc (FPS)",HIB,9.93,9.76,,9.07, "TTSIOD 3D Renderer - Phong Rendering With Soft-Shadow Mapping (FPS)",HIB,63.32,59.50,,, "John The Ripper - Test: Blowfish (Real C/S)",HIB,2215,2211,,662, "BYTE Unix Benchmark - Computational Test: Dhrystone 2 (LPS)",HIB,18737961.27,18075520.17,,, "Fhourstones - Complex Connect-4 Solving (Kpos / sec)",HIB,8643.40,8631.43,,8551.90, "GMPbench - Total Time (GMPbench Score)",HIB,1739,1751.20,,, "Timed MrBayes Analysis - Primate Phylogeny Analysis (sec)",LIB,37.07,32.38,,40.09, "Timed MAFFT Alignment - Multiple Sequence Alignment (sec)",LIB,13.73,13.60,16.14,14.73, "Timed HMMer Search - Pfam Database Search (sec)",LIB,26.52,26.63,33.02,32.63, "FFTE - Test: N=64, 1D Complex FFT Routine (MFLOPS)",HIB,3276.19,3156.92,3270.19,3197.68,3267.81