Haskell GHC versus C++ g++ 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++ g++ #6 3.25 19,788 1535 12.89 C++ g++ #7 13.93 19,660 1156 13.93 C++ g++ #5 7.97 19,788 987 31.14 C++ g++ #3 36.80 19,660 600 36.80 C++ g++ #4 9.47 19,660 1445 37.11 C++ g++ #2 9.82 19,656 1446 38.58 C++ g++ 10.59 19,660 1065 41.61 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++ g++ #0 2.14 19,676 1933 2.14 C++ g++ #7 3.97 19,804 1815 3.97 C++ g++ #2 4.20 19,676 1884 4.19 C++ g++ #3 5.30 19,804 1402 5.30 C++ g++ #9 5.43 19,676 1536 5.43 C++ g++ #4 5.44 19,804 1434 5.44 C++ g++ #5 6.01 19,676 1544 6.00 C++ g++ 6.49 19,676 1666 6.49 C++ g++ #8 6.57 19,676 1524 6.57 C++ g++ #6 6.89 19,676 1674 6.89 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++ g++ #6 0.72 19,812 1050 2.84 C++ g++ #5 1.32 19,684 1050 5.25 C++ g++ 5.36 19,684 459 5.36 Haskell GHC #4 1.48 19,796 994 5.70 C++ g++ #8 1.52 19,684 1284 6.04 Haskell GHC #2 21.48 19,796 410 21.63 mandelbrot source secs mem gz cpu secs C++ g++ 0.89 34,944 1797 3.46 C++ g++ #4 0.89 35,200 3554 3.47 C++ g++ #6 0.98 35,072 1014 3.89 C++ g++ #0 2.35 35,328 2752 9.28 C++ g++ #8 4.79 35,072 749 13.12 C++ g++ #5 13.33 34,688 596 13.33 C++ g++ #9 3.50 35,200 732 13.49 C++ g++ #7 3.49 35,072 1023 13.90 C++ g++ #2 16.90 34,560 700 16.90 C++ g++ #3 27.26 19,804 421 27.25 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++ g++ #5 0.86 19,804 804 0.86 C++ g++ #4 0.88 19,804 521 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++ g++ #6 1.15 276,276 2856 2.18 Haskell GHC #3 1.07 411,520 2219 2.28 C++ g++ #2 2.84 212,776 706 3.60 C++ g++ 3.62 212,180 662 3.62 C++ g++ #5 3.86 215,556 859 4.54 C++ g++ #3 12.41 217,580 859 17.91 C++ g++ #4 Make Error fasta source secs mem gz cpu secs C++ g++ #8 0.76 19,792 2758 1.51 C++ g++ #2 1.81 19,668 1129 1.81 C++ g++ 1.90 19,664 1064 1.90 C++ g++ #3 2.62 19,664 1311 2.62 C++ g++ #4 3.32 19,664 1291 3.32 C++ g++ #6 1.05 19,668 2326 3.85 C++ g++ #5 1.05 19,668 2345 3.88 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 C++ g++ #7 Make Error k-nucleotide source secs mem gz cpu secs C++ g++ #2 1.97 156,504 1634 5.87 C++ g++ #3 4.19 165,592 1280 13.77 C++ g++ 6.90 757,080 1452 14.68 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++ g++ #2 0.70 499,840 2099 0.70 Haskell GHC #4 3.76 505,600 1047 3.82 C++ g++ #6 3.20 1,517,660 1827 4.22 C++ g++ 6.56 980,060 599 6.56 Haskell GHC #2 6.81 3,812,096 998 6.90 C++ g++ #5 35.10 771,556 704 35.10 C++ g++ #3 Bad Output binary-trees source secs mem gz cpu secs C++ g++ #7 0.95 201,400 896 3.30 C++ g++ #5 1.14 200,660 891 3.98 C++ g++ #9 1.72 135,936 815 4.46 C++ g++ #6 1.88 266,112 851 4.47 C++ g++ #3 1.88 265,600 951 4.72 C++ g++ #8 2.18 265,984 826 5.11 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 C++ g++ 2.65 2,040,792 760 9.07 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++ g++ #2 21.51 265,856 514 21.51 C++ g++ #4 Make Error Haskell GHC The Glorious Glasgow Haskell Compilation System, version 9.4.8 LLVM version 17.0.2 C++ g++ Ubuntu 13.2.0-4ubuntu3 all Haskell GHC programs & measurements all C++ g++ programs & measurements