Fastest cpu secs C# .NET versus C++ g++ 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 cpu seconds, less gz source code. fannkuch-redux source mem gz cpu C# .NET #8 33,148 1473 8.28 C++ g++ #6 2,000 1528 12.93 C++ g++ #7 992 1150 13.89 C++ g++ #5 2,000 980 29.40 C# .NET #9 32,836 1225 34.63 C# .NET #6 32,152 1068 39.27 C++ g++ #4 2,216 1439 40.52 C++ g++ #3 988 593 40.55 C++ g++ #2 2,224 1440 42.64 C++ g++ 2,164 1059 42.76 C# .NET #7 Bad Output n-body source mem gz cpu C++ g++ #0 964 1927 2.17 C# .NET #9 33,528 2467 3.17 C# .NET #4 33,456 2125 3.83 C++ g++ #2 1,944 1879 4.06 C++ g++ #7 1,976 1808 4.28 C# .NET #7 33,644 1704 4.78 C# .NET #6 33,932 1742 4.80 C++ g++ #9 1,260 1530 4.90 C++ g++ #6 1,300 1668 5.65 C++ g++ #4 1,040 1428 5.68 C++ g++ #3 1,280 1396 5.74 C++ g++ 1,260 1659 5.93 C++ g++ #8 1,220 1517 6.08 C++ g++ #5 1,944 1749 6.11 C# .NET #3 34,000 1305 6.90 C# .NET #2 33,984 1343 7.03 C# .NET #8 33,996 1332 7.03 spectral-norm source mem gz cpu C++ g++ #6 1,348 1044 2.85 C# .NET #5 35,524 764 2.97 C++ g++ #5 2,048 1044 5.26 C++ g++ 1,964 452 5.36 C# .NET #3 33,368 878 5.78 C++ g++ #8 1,348 1278 6.09 mandelbrot source mem gz cpu C++ g++ #4 34,720 3542 3.27 C++ g++ 32,336 1791 3.48 C++ g++ #6 31,792 1002 3.88 C++ g++ #0 34,712 2739 4.06 C# .NET 66,656 1974 12.16 C# .NET #9 66,528 816 12.17 C++ g++ #8 34,448 742 13.19 C++ g++ #5 33,640 590 13.37 C++ g++ #9 34,428 726 13.48 C++ g++ #7 34,392 1017 13.92 C# .NET #5 64,376 839 16.15 C++ g++ #2 34,176 692 17.47 C++ g++ #3 1,976 414 28.53 pidigits source mem gz cpu C++ g++ #4 4,220 513 0.71 C++ g++ #5 4,284 798 0.72 C# .NET #6 33,768 1168 0.78 C# .NET #5 35,888 977 0.83 C# .NET #4 32,828 1121 1.27 C# .NET #7 53,276 567 8.41 regex-redux source mem gz cpu C++ g++ #6 275,924 2850 2.20 C# .NET #8 319,484 1869 2.65 C++ g++ #4 203,888 1315 3.39 C++ g++ 207,788 656 3.57 C++ g++ #2 198,316 700 3.69 C++ g++ #5 214,888 852 4.28 C# .NET #5 1,061,452 673 7.45 C++ g++ #3 217,248 853 18.28 fasta source mem gz cpu C++ g++ #8 2,720 2751 1.52 C++ g++ #2 2,004 1127 1.85 C++ g++ 2,000 1057 1.97 C++ g++ #3 1,964 1307 2.62 C++ g++ #4 1,016 1287 3.36 C++ g++ #5 4,540 2344 3.75 C++ g++ #6 4,564 2324 3.89 C# .NET #5 85,788 1691 4.43 C# .NET 51,376 2098 5.16 C++ g++ #7 Make Error k-nucleotide source mem gz cpu C++ g++ #2 156,416 1631 5.92 C# .NET 185,200 2044 10.97 C++ g++ #3 165,588 1276 14.14 C++ g++ 756,320 1446 14.54 C# .NET #6 180,876 1603 15.87 reverse-complement source mem gz cpu C++ g++ #2 499,708 2093 0.64 C# .NET #8 930,564 2637 1.25 C++ g++ #3 500,008 840 2.62 C# .NET #6 1,029,352 1621 3.79 C++ g++ #6 1,513,136 1832 4.00 C# .NET #5 1,032,176 1613 4.02 C# .NET #7 979,712 1310 5.13 C++ g++ 979,988 592 6.34 C++ g++ #5 765,148 720 34.88 binary-trees source mem gz cpu C++ g++ #7 168,192 890 3.38 C++ g++ #5 200,020 885 4.10 C++ g++ #9 135,652 809 4.16 C++ g++ #3 265,220 945 4.65 C++ g++ #6 265,784 844 4.72 C++ g++ #8 265,808 820 5.05 C++ g++ 1,947,704 754 8.99 C# .NET #7 1,609,712 694 15.29 C# .NET #3 1,964,552 676 15.35 C# .NET #2 1,475,276 705 15.77 C# .NET 1,691,664 657 16.14 C++ g++ #2 265,180 508 22.61 C++ g++ #4 Make Error C# .NET .NET SDK 6.0.101 Host Version: 6.0.1; Commit: 3a25a7f1cc <ServerGarbageCollection>true C++ g++ 11.2.0-19ubuntu1 all C# .NET programs & measurements all C++ g++ programs & measurements