Core i7 5960X Compilers GCC vs. LLVM Clang on the Intel Core i7 5960X Haswell-E platform with Ubuntu 14.10 Linux on the 3.16 kernel. GCC 4.9.1: Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Haswell-E DMI2, Memory: 16384MB, Disk: 128GB Crucial_CT128MX1, Graphics: Sapphire AMD Radeon HD 6870 1024MB, Audio: Intel Wellsburg HD Audio, Monitor: SyncMaster, Network: Intel Connection OS: Ubuntu 14.10, Kernel: 3.16.0-12-generic (x86_64), Desktop: Unity 7.3.1, Display Server: X Server 1.15.1, Display Driver: radeon 7.4.0, OpenGL: 3.3 Mesa 10.2.6 Gallium 0.4, Compiler: GCC 4.9.1, File-System: ext4, Screen Resolution: 2560x1600 LLVM Clang 3.5: Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Haswell-E DMI2, Memory: 16384MB, Disk: 128GB Crucial_CT128MX1, Graphics: Sapphire AMD Radeon HD 6870 1024MB, Audio: Intel Wellsburg HD Audio, Monitor: SyncMaster, Network: Intel Connection OS: Ubuntu 14.10, Kernel: 3.16.0-12-generic (x86_64), Desktop: Unity 7.3.1, Display Server: X Server 1.15.1, Display Driver: radeon 7.4.0, OpenGL: 3.3 Mesa 10.2.6 Gallium 0.4, Compiler: Clang 3.5.0-1ubuntu1, File-System: ext4, Screen Resolution: 2560x1600 SciMark 2.0 Computational Test: Composite Mflops > Higher Is Better GCC 4.9.1 ...... 1226.25 |================================== LLVM Clang 3.5 . 1922.22 |===================================================== SciMark 2.0 Computational Test: Monte Carlo Mflops > Higher Is Better GCC 4.9.1 ...... 478.03 |=================================================== LLVM Clang 3.5 . 510.58 |====================================================== SciMark 2.0 Computational Test: Fast Fourier Transform Mflops > Higher Is Better GCC 4.9.1 ...... 336.60 |==================================================== LLVM Clang 3.5 . 351.38 |====================================================== SciMark 2.0 Computational Test: Sparse Matrix Multiply Mflops > Higher Is Better GCC 4.9.1 ...... 2127.38 |============================================== LLVM Clang 3.5 . 2474.85 |===================================================== SciMark 2.0 Computational Test: Dense LU Matrix Factorization Mflops > Higher Is Better GCC 4.9.1 ...... 2256.78 |======================== LLVM Clang 3.5 . 4889.54 |===================================================== SciMark 2.0 Computational Test: Jacobi Successive Over-Relaxation Mflops > Higher Is Better GCC 4.9.1 ...... 932.44 |==================================== LLVM Clang 3.5 . 1384.75 |===================================================== John The Ripper 1.8.0 Test: Blowfish Real C/S > Higher Is Better GCC 4.9.1 ...... 11473 |======================================================= LLVM Clang 3.5 . 796 |==== John The Ripper 1.8.0 Test: Traditional DES Real C/S > Higher Is Better GCC 4.9.1 ...... 17700000 |==================================================== LLVM Clang 3.5 . 4547667 |============= John The Ripper 1.8.0 Test: MD5 Real C/S > Higher Is Better GCC 4.9.1 ...... 146966 |====================================================== LLVM Clang 3.5 . 13244 |===== x264 2014-08-30 H.264 Video Encoding Frames Per Second > Higher Is Better GCC 4.9.1 ...... 239.97 |====================================================== LLVM Clang 3.5 . 237.37 |===================================================== Himeno Benchmark 3.0 Poisson Pressure Solver MFLOPS > Higher Is Better GCC 4.9.1 ...... 1563.44 |===================================================== LLVM Clang 3.5 . 1374.96 |=============================================== Timed Apache Compilation 2.4.7 Time To Compile Seconds < Lower Is Better GCC 4.9.1 ...... 33.84 |======================================================= LLVM Clang 3.5 . 22.98 |===================================== Timed PHP Compilation 5.2.9 Time To Compile Seconds < Lower Is Better GCC 4.9.1 ...... 20.91 |======================================================= LLVM Clang 3.5 . 18.59 |================================================= C-Ray 1.1 Total Time Seconds < Lower Is Better GCC 4.9.1 ...... 9.73 |==================================== LLVM Clang 3.5 . 14.77 |======================================================= Smallpt 1.0 Global Illumination Renderer; 100 Samples Seconds < Lower Is Better GCC 4.9.1 ...... 14 |===== LLVM Clang 3.5 . 172 |========================================================= FLAC Audio Encoding 1.3.0 WAV To FLAC Seconds < Lower Is Better GCC 4.9.1 ...... 4.89 |==================================================== LLVM Clang 3.5 . 5.28 |======================================================== LAME MP3 Encoding 3.99.3 WAV To MP3 Seconds < Lower Is Better GCC 4.9.1 ...... 14.38 |============================================= LLVM Clang 3.5 . 17.45 |======================================================= Hierarchical INTegration 1.0 Test: FLOAT QUIPs > Higher Is Better GCC 4.9.1 ...... 253952490.31 |================================================ LLVM Clang 3.5 . 205919869.28 |======================================= Apache Benchmark 2.4.7 Static Web Page Serving Requests Per Second > Higher Is Better GCC 4.9.1 ...... 17082.05 |==================================================== LLVM Clang 3.5 . 16917.89 |====================================================