Haskell GHC versus C gcc fastest performance Always look at the source code. If the fastest programs are hand-written vector instructions, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code. fannkuch-redux source secs mem gz cpu secs C gcc #6 2.16 19,516 1582 8.53 C gcc #4 14.20 19,516 1190 14.20 C gcc #5 6.91 19,644 917 27.13 C gcc #3 39.57 19,516 574 39.57 C gcc 42.24 19,640 514 42.24 C gcc #2 11.16 19,644 1563 43.66 Haskell GHC #5 11.28 19,644 850 44.70 Haskell GHC #4 50.67 19,768 671 51.56 Haskell GHC #6 15.24 21,632 1123 59.78 Haskell GHC #2 46.08 25,600 815 139.01 Haskell GHC 281.08 19,644 567 287.17 Haskell GHC #3 Make Error n-body source secs mem gz cpu secs C gcc #9 2.10 19,520 1639 2.10 C gcc #8 3.70 19,520 1398 3.69 C gcc #4 4.30 19,520 1496 4.30 C gcc #6 4.96 19,520 1186 4.96 C gcc 5.18 19,520 1179 5.18 C gcc #2 5.18 19,520 1270 5.18 C gcc #3 5.24 19,520 1214 5.24 C gcc #5 5.41 19,648 1436 5.41 C gcc #7 6.81 19,520 1250 6.81 Haskell GHC #2 11.05 19,668 1888 11.20 Haskell GHC 14.80 19,796 1713 15.00 spectral-norm source secs mem gz cpu secs C gcc #6 0.41 19,760 1203 1.61 C gcc #5 0.72 19,520 576 2.84 C gcc #7 0.73 19,520 906 2.84 C gcc #4 0.72 19,520 1145 2.84 C gcc 5.39 19,520 390 5.39 C gcc #3 1.43 19,520 470 5.68 Haskell GHC #4 1.48 19,796 994 5.70 Haskell GHC #2 21.48 19,796 410 21.63 C gcc #8 Make Error mandelbrot source secs mem gz cpu secs C gcc #6 1.28 33,280 1141 5.11 C gcc #8 1.63 33,536 788 6.30 C gcc #4 3.48 33,152 805 13.85 C gcc 3.49 32,896 828 13.88 C gcc #7 3.49 33,152 1000 13.89 C gcc #3 3.54 32,768 769 14.07 C gcc #9 4.22 33,280 700 16.30 C gcc #2 24.97 19,520 412 24.97 Haskell GHC #2 12.34 45,184 789 49.13 Haskell GHC 52.21 260,352 628 53.00 Haskell GHC #3 Make Error pidigits source secs mem gz cpu secs C gcc #2 0.81 19,520 422 0.81 C gcc 0.88 19,520 459 0.88 Haskell GHC #6 1.59 19,668 368 1.65 Haskell GHC #4 1.80 19,796 355 1.87 Haskell GHC #3 2.17 19,796 387 2.25 Haskell GHC #2 2.19 19,796 592 2.26 Haskell GHC 2.22 19,796 466 2.29 Haskell GHC #5 119.18 19,668 934 119.32 regex-redux source secs mem gz cpu secs C gcc #5 0.80 152,388 1403 2.03 Haskell GHC #3 1.07 411,520 2219 2.28 C gcc #2 3.23 103,296 1121 3.23 C gcc #4 0.96 152,256 1237 3.27 C gcc #3 1.72 103,680 1273 3.29 fasta source secs mem gz cpu secs C gcc #9 0.78 19,520 1469 0.78 C gcc #5 1.24 19,520 1286 1.24 C gcc #6 0.93 19,648 1936 2.73 C gcc #8 2.79 19,520 1299 2.79 C gcc #4 3.02 19,520 1244 3.02 C gcc #2 0.83 19,520 2270 3.26 C gcc #7 0.85 19,648 2018 3.29 C gcc 3.74 19,520 1209 3.73 C gcc #3 4.49 19,520 825 4.48 Haskell GHC #4 1.89 41,216 2017 4.73 Haskell GHC #5 2.45 19,652 2004 6.27 Haskell GHC #6 2.35 19,648 1885 6.49 Haskell GHC 7.23 19,644 975 7.32 Haskell GHC #3 8.72 616,692 1091 8.84 Haskell GHC #2 6.27 438,784 1323 19.11 k-nucleotide source secs mem gz cpu secs C gcc 3.80 130,432 1512 12.64 Haskell GHC 22.83 659,584 1067 77.84 Haskell GHC #2 22.61 802,944 1492 87.50 Haskell GHC #3 37.00 413,952 2266 133.16 reverse-complement source secs mem gz cpu secs C gcc #7 0.43 499,872 1899 0.58 C gcc #8 0.50 499,872 1551 0.86 C gcc #6 0.96 703,064 828 1.37 C gcc #5 1.50 994,176 654 1.50 C gcc #2 1.05 994,432 757 1.55 C gcc #4 3.66 500,480 716 3.66 Haskell GHC #4 3.76 505,600 1047 3.82 Haskell GHC #2 6.81 3,812,096 998 6.90 binary-trees source secs mem gz cpu secs C gcc #2 1.51 169,088 816 4.17 C gcc #3 1.89 134,400 842 4.59 Haskell GHC #8 2.38 256,828 807 5.96 Haskell GHC #7 3.18 298,112 817 7.81 Haskell GHC #6 4.08 242,720 601 8.35 Haskell GHC 13.52 669,824 500 15.19 Haskell GHC #3 6.91 650,240 544 15.45 Haskell GHC #5 7.34 674,944 567 15.67 Haskell GHC #2 14.46 263,936 498 16.05 C gcc 20.83 264,192 660 20.83 C gcc #5 8.27 351,232 914 30.31 Haskell GHC The Glorious Glasgow Haskell Compilation System, version 9.4.8 LLVM version 17.0.2 C gcc 13.2.0-4ubuntu3 all Haskell GHC programs & measurements all C gcc programs & measurements