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GCC 4.8 vs Clang 4.2

a guest Dec 2nd, 2012 184 Never
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  1. # clang -v
  2. FreeBSD clang version 3.2 (trunk 162107) 20120817
  3.  
  4. # gcc48 -v
  5. gcc version 4.8.0 20121014 (experimental) (FreeBSD Ports Collection)
  6.  
  7. # sysctl -a | egrep -i 'hw.machine|hw.model|hw.ncpu'
  8. hw.machine: amd64
  9. hw.model: Intel(R) Xeon(R) CPU           L3426  @ 1.87GHz
  10. hw.ncpu: 8
  11. hw.machine_arch: amd64
  12.  
  13. # ./bench.sh
  14. time ./gcc/prim-native-gcc
  15.        20,28 real        19,04 user         0,07 sys
  16. time ./gcc/prim-native-gcc-O2
  17.         4,83 real         4,51 user         0,02 sys
  18. time ./gcc/prim-native-gcc-O3
  19.         4,79 real         4,52 user         0,02 sys
  20. time ./gcc/prim-nocona-gcc
  21.        16,97 real        15,95 user         0,03 sys
  22. time ./gcc/prim-nocona-gcc-O2
  23.         5,18 real         4,67 user         0,03 sys
  24. time ./gcc/prim-nocona-gcc-O3
  25.         4,96 real         4,56 user         0,04 sys
  26. time ./gcc/prim-i7-gcc
  27.        20,98 real        19,14 user         0,07 sys
  28. time ./gcc/prim-i7-gcc-O2
  29.         4,91 real         4,54 user         0,02 sys
  30. time ./gcc/prim-i7-gcc-O3
  31.         5,06 real         4,56 user         0,01 sys
  32.  
  33. =======================================
  34.  
  35. time ./clang/prim-native-clang
  36.        17,66 real        16,02 user         0,08 sys
  37. time ./clang/prim-native-clang-O2
  38.         5,29 real         4,71 user         0,03 sys
  39. time ./clang/prim-native-clang-O3
  40.         5,02 real         4,64 user         0,02 sys
  41. time ./clang/prim-nocona-clang
  42.        17,45 real        15,97 user         0,05 sys
  43. time ./clang/prim-nocona-clang-O2
  44.         4,94 real         4,62 user         0,03 sys
  45. time ./clang/prim-i7-gcc
  46.        17,30 real        15,94 user         0,07 sys
  47. time ./clang/prim-i7-clang-O2
  48.         5,24 real         4,65 user         0,05 sys
  49. time ./clang/prim-i7-clang-O3
  50.         5,14 real         4,66 user         0,01 sys
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