C# .NET versus F# .NET 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# .NET #8 2.23 31,164 1485 8.60 C# .NET #2 29.55 30,468 584 29.52 F# .NET #6 8.37 31,488 1103 32.55 C# .NET #6 8.65 30,684 1075 34.32 C# .NET #9 9.07 32,108 1232 35.94 F# .NET #5 9.84 36,572 927 38.67 C# .NET #3 11.39 30,804 1117 44.78 F# .NET 91.91 49,912 558 96.68 C# .NET #7 Bad Output n-body source secs mem gz cpu secs C# .NET #9 3.16 30,044 2480 3.15 C# .NET #4 3.79 30,088 2137 3.77 C# .NET #7 4.79 30,216 1715 4.77 C# .NET #6 4.82 30,196 1754 4.80 F# .NET #6 4.97 34,020 1395 4.95 F# .NET #5 5.01 34,008 1363 5.00 C# .NET #3 6.64 31,212 1311 6.62 C# .NET #2 6.82 31,168 1350 6.81 C# .NET #8 6.82 31,208 1339 6.81 F# .NET #4 6.88 34,256 1296 6.87 F# .NET #3 6.92 32,088 1624 6.89 F# .NET #2 7.39 34,188 1387 7.37 C# .NET 7.79 31,240 1424 7.77 F# .NET 7.76 49,484 1272 7.82 spectral-norm source secs mem gz cpu secs C# .NET #5 0.93 36,020 776 3.34 C# .NET 5.39 31,320 480 5.38 C# .NET #2 1.51 31,432 1084 5.75 C# .NET #3 1.56 33,348 890 5.85 F# .NET #4 1.62 36,224 738 6.01 F# .NET #2 Timed Out mandelbrot source secs mem gz cpu secs C# .NET 3.23 66,812 1980 12.56 C# .NET #9 3.23 66,560 822 12.59 C# .NET #5 4.02 64,276 851 15.75 C# .NET #3 6.80 64,652 722 26.77 F# .NET #2 7.22 38,032 1054 28.29 C# .NET #2 45.95 31,572 504 45.90 F# .NET #5 Make Error F# .NET Make Error F# .NET #6 Make Error pidigits source secs mem gz cpu secs C# .NET #5 0.92 34,692 990 0.94 C# .NET #6 0.96 32,836 1182 0.94 F# .NET #6 0.97 31,460 917 0.95 C# .NET #4 1.36 33,556 1135 1.35 F# .NET #4 1.35 33,388 887 1.37 C# .NET #7 6.49 53,064 579 7.05 regex-redux source secs mem gz cpu secs C# .NET #8 1.36 388,756 1881 2.60 C# .NET 4.58 847,156 641 4.81 F# .NET #2 4.63 852,508 437 4.87 F# .NET #6 1.76 860,064 622 5.19 C# .NET #5 2.07 861,292 679 6.28 F# .NET #7 4.50 1,397,868 610 6.36 C# .NET #4 13.01 960,932 854 43.92 F# .NET Bad Output F# .NET #4 Bad Output fasta source secs mem gz cpu secs F# .NET #3 1.14 72,032 1361 4.13 F# .NET #4 1.24 90,032 1355 4.62 C# .NET #5 1.48 49,500 1702 5.38 C# .NET 1.83 52,060 2113 6.61 k-nucleotide source secs mem gz cpu secs C# .NET #6 4.89 187,780 1615 12.63 F# .NET #2 4.71 198,872 1932 16.34 F# .NET #5 4.92 198,784 1964 16.53 F# .NET #3 12.07 1,322,292 1124 26.04 F# .NET #4 10.47 1,321,944 1522 26.43 C# .NET #7 40.42 762,076 1449 40.86 C# .NET #4 11.44 777,216 1725 41.13 F# .NET 24.10 1,108,380 713 83.78 C# .NET Make Error F# .NET #6 Make Error reverse-complement source secs mem gz cpu secs C# .NET #8 0.55 718,428 2641 1.30 C# .NET 2.96 798,072 1130 3.12 C# .NET #5 2.60 1,026,320 1620 3.58 C# .NET #6 1.58 1,027,952 1627 3.80 C# .NET #7 1.53 942,900 1312 4.16 C# .NET #3 7.33 1,572,192 934 11.43 F# .NET 37.87 1,962,472 603 39.22 F# .NET #4 Timed Out F# .NET #5 Timed Out binary-trees source secs mem gz cpu secs F# .NET 10.25 1,214,512 517 12.10 C# .NET #2 4.48 1,624,564 717 14.25 C# .NET #7 4.54 1,608,796 706 14.53 F# .NET #7 5.26 1,671,736 527 15.45 C# .NET #3 4.84 2,089,712 688 15.89 C# .NET 5.08 2,046,692 668 16.32 C# .NET .NET SDK 8.0.200 Host Version: 8.0.2 Commit: 1381d5ebd2 <ServerGarbageCollection>true F# .NET .NET SDK 8.0.200 Host Version: 8.0.2 Commit: 1381d5ebd2 <ServerGarbageCollection>true F# 8.0 all C# .NET programs & measurements all F# .NET programs & measurements