weichih Running pts/c-ray-1.1.0 via the Phoronix Test Suite. clang clang++: Processor: Intel Core i5-4210U @ 2.39GHz (2 Cores), Motherboard: Oracle VirtualBox v1.2, Chipset: Intel 440FX- 82441FX PMC, Memory: 8192MB, Disk: 52GB VBOX HDD, Graphics: InnoTek VirtualBox, Audio: Intel 82801AA AC 97 Audio, Monitor: VBOX monitor, Network: Intel 82540EM Gigabit OS: Ubuntu 16.04, Kernel: 4.4.0-31-generic (x86_64), Desktop: Unity 7.4.0, Display Driver: modesetting 1.18.3, Compiler: GCC 5.4.0 20160609 + Clang 3.3 + LLVM 3.3, File-System: ext4, Screen Resolution: 800x600, System Layer: Oracle VirtualBox change flag: Processor: Intel Core i5-4210U @ 2.39GHz (2 Cores), Motherboard: Oracle VirtualBox v1.2, Chipset: Intel 440FX- 82441FX PMC, Memory: 8192MB, Disk: 52GB VBOX HDD, Graphics: InnoTek VirtualBox, Audio: Intel 82801AA AC 97 Audio, Monitor: VBOX monitor, Network: Intel 82540EM Gigabit OS: Ubuntu 16.04, Kernel: 4.4.0-31-generic (x86_64), Desktop: Unity 7.4.0, Display Driver: modesetting 1.18.3, Compiler: GCC 5.4.0 20160609 + Clang 3.3 + LLVM 3.3, File-System: ext4, Screen Resolution: 800x600, System Layer: Oracle VirtualBox C-Ray 1.1 Total Time Seconds < Lower Is Better clang clang++ . 255.17 |======== change flag ... 1734.27 |======================================================