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 Intel i7 4700HQ: Processor: Intel Core i7-4700HQ @ 2.40GHz (8 Cores), Motherboard: ASUS G750JM v1.0, Chipset: Intel Xeon E3-1200 v3/4th, Memory: 31744MB, Disk: 1000GB Seagate ST1000LM014-1EJ1 + 1000GB TOSHIBA MQ01ABD1 + 1500GB HGST HTS541515A9, Graphics: Intel HD 4600 (1200MHz), Audio: Intel Haswell HDMI, Network: Qualcomm Atheros QCA8171 Gigabit + Broadcom BCM4352 802.11ac Wireless OS: Ubuntu 14.04, Kernel: 3.13.0-39-generic (x86_64), Desktop: Unity 7.2.3, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8 + CUDA 5.5, File-System: ext4, Screen Resolution: 1920x1080 SciMark 2.0 Computational Test: Composite Mflops > Higher Is Better GCC 4.9.1 ....... 1226.25 |================================= LLVM Clang 3.5 .. 1922.22 |==================================================== Intel i7 4700HQ . 1186.91 |================================ SciMark 2.0 Computational Test: Monte Carlo Mflops > Higher Is Better GCC 4.9.1 ....... 478.03 |================================================ LLVM Clang 3.5 .. 510.58 |=================================================== Intel i7 4700HQ . 526.24 |===================================================== SciMark 2.0 Computational Test: Fast Fourier Transform Mflops > Higher Is Better GCC 4.9.1 ....... 336.60 |=================================================== LLVM Clang 3.5 .. 351.38 |===================================================== Intel i7 4700HQ . 248.55 |===================================== SciMark 2.0 Computational Test: Sparse Matrix Multiply Mflops > Higher Is Better GCC 4.9.1 ....... 2127.38 |============================================= LLVM Clang 3.5 .. 2474.85 |==================================================== Intel i7 4700HQ . 1873.04 |======================================= 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 |==================================================== Intel i7 4700HQ . 2290.27 |======================== 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 |==================================================== Intel i7 4700HQ . 996.48 |===================================== 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 |==================================================== Intel i7 4700HQ . 159.38 |=================================== Himeno Benchmark 3.0 Poisson Pressure Solver MFLOPS > Higher Is Better GCC 4.9.1 ....... 1563.44 |==================================================== LLVM Clang 3.5 .. 1374.96 |============================================== Intel i7 4700HQ . 1513.22 |================================================== 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 |===================================== Intel i7 4700HQ . 33.32 |===================================================== 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 |================================= Intel i7 4700HQ . 30.38 |====================================================== C-Ray 1.1 Total Time Seconds < Lower Is Better GCC 4.9.1 ....... 9.73 |=================== LLVM Clang 3.5 .. 14.77 |============================ Intel i7 4700HQ . 28.07 |====================================================== Smallpt 1.0 Global Illumination Renderer; 100 Samples Seconds < Lower Is Better GCC 4.9.1 ....... 14 |===== LLVM Clang 3.5 .. 172 |======================================================== Intel i7 4700HQ . 128 |========================================== 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 |====================================================== Intel i7 4700HQ . 5.33 |======================================================= 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 |====================================================== Intel i7 4700HQ . 14.30 |============================================ Hierarchical INTegration 1.0 Test: FLOAT QUIPs > Higher Is Better GCC 4.9.1 ....... 253952490.31 |====================================== LLVM Clang 3.5 .. 205919869.28 |=============================== Intel i7 4700HQ . 313969890.38 |=============================================== 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 |========================= Intel i7 4700HQ . 34006.17 |===================================================