MacMini with OSX 10.9 (Intel Core i7-3720QM 2.6GHz (Turbo 3.6 GHz)) 14.11 ===== Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn) 14.11.9.5817 non-RTEA, non-MT, inlining_size = 8, full class checking): 81.504u 6.732s 1:28.42 99.7% 0+0k 93+2741io 0pf+0w 14.05 ===== Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) 14.05.9.4544 non-RTEA, non-MT, inlining_size = 8, full class checking): 77.039u 6.516s 1:23.61 99.9% 0+0k 19+2189io 0pf+0w 14.05.9.4181 non-RTEA, non-MT, inlining_size = 8, not full class checking): 73.527u 5.978s 1:19.54 99.9% 0+0k 25+2249io 0pf+0w 70.844u 5.951s 1:16.83 99.9% 0+0k 6+2191io 0pf+0w 13.11 ===== Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) 78.704u 7.139s 1:27.33 98.2% 0+0k 0+3165io 2244pf+0w