clang O2 this is used for testing clang with O2 clang o2: Processor: Intel Core i5-3470 @ 3.19GHz (4 Cores), Motherboard: LENOVO QiTianM4350, Chipset: Intel Xeon E3-1200 v2/3rd, Memory: 3584MB, Disk: 500GB Seagate ST500DM002-1BD14, Graphics: Intel HD 2500 (1100MHz), Audio: Realtek ALC662 rev3, Network: Realtek RTL8111/8168/8411 OS: Ubuntu 14.04, Kernel: 3.13.0-32-generic (x86_64), Desktop: Unity 7.2.2, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: Clang 3.3 + GCC 4.6.4 + LLVM 3.3, File-System: ext4, Screen Resolution: 1440x900, System Layer: Xen 4.4.0 Hypervisor Timed HMMer Search 2.3.2 Pfam Database Search Seconds < Lower Is Better clang o2 . 17.66 |============================================================= Gcrypt Library 1.4.4 CAMELLIA256-ECB Cipher Microseconds < Lower Is Better clang o2 . 2340 |============================================================== John The Ripper 1.8.0 Test: Blowfish Real C/S > Higher Is Better clang o2 . 3571 |============================================================== x264 2014-01-09 H.264 Video Encoding Frames Per Second > Higher Is Better clang o2 . 109.54 |============================================================ GraphicsMagick 1.3.19 Operation: Sharpen Iterations Per Minute > Higher Is Better clang o2 . 46 |================================================================ GraphicsMagick 1.3.19 Operation: Resizing Iterations Per Minute > Higher Is Better clang o2 . 112 |=============================================================== GraphicsMagick 1.3.19 Operation: HWB Color Space Iterations Per Minute > Higher Is Better clang o2 . 149 |=============================================================== 7-Zip Compression 9.20.1 Compress Speed Test MIPS > Higher Is Better clang o2 . 12591 |============================================================= Timed Apache Compilation 2.4.7 Time To Compile Seconds < Lower Is Better clang o2 . 42.33 |============================================================= Timed ImageMagick Compilation 6.8.1-10 Time To Compile Seconds < Lower Is Better clang o2 . 57.56 |============================================================= Timed PHP Compilation 5.2.9 Time To Compile Seconds < Lower Is Better clang o2 . 37.41 |============================================================= C-Ray 1.1 Total Time Seconds < Lower Is Better clang o2 . 44.95 |============================================================= Bullet Physics Engine 2.81 Test: Raytests Seconds < Lower Is Better clang o2 . 4.05 |============================================================== Bullet Physics Engine 2.81 Test: 3000 Fall Seconds < Lower Is Better clang o2 . 5.99 |============================================================== Bullet Physics Engine 2.81 Test: 1000 Stack Seconds < Lower Is Better clang o2 . 7.05 |============================================================== Bullet Physics Engine 2.81 Test: 1000 Convex Seconds < Lower Is Better clang o2 . 6.53 |============================================================== Bullet Physics Engine 2.81 Test: Convex Trimesh Seconds < Lower Is Better clang o2 . 1.56 |============================================================== LAME MP3 Encoding 3.99.3 WAV To MP3 Seconds < Lower Is Better clang o2 . 14.38 |============================================================= OpenSSL 1.0.1g RSA 4096-bit Performance Signs Per Second > Higher Is Better clang o2 . 450.40 |============================================================ Apache Benchmark 2.4.7 Static Web Page Serving Requests Per Second > Higher Is Better clang o2 . 9590.52 |===========================================================