Different Compilers for Kmer Counting Comparison of different compilers Clang: Processor: Intel Core i7-6700 @ 3.40GHz (8 Cores), Motherboard: Dell 0HD5W2, Chipset: Intel Device 191f, Memory: 16384MB, Disk: 16251GB, Graphics: LLVMpipe, Audio: Intel Device a170, Monitor: DELL U2715H, Network: Intel Connection OS: Debian 8.5, Kernel: 3.16.0-4-amd64 (x86_64), Desktop: GNOME Shell 3.14.4, Display Server: X Server 1.16.4, Display Driver: intel 2.21.15, OpenGL: 3.0 Mesa 10.3.2 Gallium 0.4, Compiler: Clang 3.5.0-10 + GCC 4.9.2 + LLVM 3.5.0, File-System: nfs, Screen Resolution: 2560x1440 GCC: Processor: Intel Core i7-6700 @ 3.40GHz (8 Cores), Motherboard: Dell 0HD5W2, Chipset: Intel Device 191f, Memory: 16384MB, Disk: 16251GB, Graphics: LLVMpipe, Audio: Intel Device a170, Monitor: DELL U2715H, Network: Intel Connection OS: Debian 8.5, Kernel: 3.16.0-4-amd64 (x86_64), Desktop: GNOME Shell 3.14.4, Display Server: X Server 1.16.4, Display Driver: intel 2.21.15, OpenGL: 3.0 Mesa 10.3.2 Gallium 0.4, Compiler: GCC 4.9.2 + Clang 3.5.0-10 + LLVM 3.5.0, File-System: nfs, Screen Resolution: 2560x1440 SEQAN TEST Counting kmers of variable length 2.2.0 Counting 10-mers Seconds < Lower Is Better Clang . 39.82 |================================================================ GCC ... 36.24 |========================================================== SEQAN TEST Counting kmers of variable length 2.2.0 Counting 15-mers Seconds < Lower Is Better Clang . 110.56 |=========================================================== GCC ... 118.80 |===============================================================