F# .NET versus OCaml 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 F# .NET #6 8.37 31,488 1103 32.55 OCaml #3 8.94 19,796 1024 35.72 OCaml #4 8.93 19,796 1018 35.73 F# .NET #5 9.84 36,572 927 38.67 OCaml #2 46.91 19,668 478 46.91 OCaml 51.57 19,668 529 51.57 F# .NET 91.91 49,912 558 96.68 n-body source secs mem gz cpu secs F# .NET #6 4.97 34,020 1395 4.95 F# .NET #5 5.01 34,008 1363 5.00 OCaml 6.83 19,688 1255 6.83 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 F# .NET 7.76 49,484 1272 7.82 spectral-norm source secs mem gz cpu secs OCaml #2 5.31 19,688 383 5.31 F# .NET #4 1.62 36,224 738 6.01 F# .NET #2 Timed Out mandelbrot source secs mem gz cpu secs F# .NET #2 7.22 38,032 1054 28.29 OCaml #6 28.68 19,688 450 28.68 OCaml 7.55 19,812 723 30.02 F# .NET #5 Make Error F# .NET Make Error F# .NET #6 Make Error pidigits source secs mem gz cpu secs F# .NET #6 0.97 31,460 917 0.95 F# .NET #4 1.35 33,388 887 1.37 OCaml #5 2.86 19,508 465 2.86 OCaml #7 Make Error regex-redux source secs mem gz cpu secs F# .NET #2 4.63 852,508 437 4.87 F# .NET #6 1.76 860,064 622 5.19 F# .NET #7 4.50 1,397,868 610 6.36 OCaml #2 13.51 922,760 644 13.51 F# .NET Bad Output F# .NET #4 Bad Output OCaml #3 Make Error fasta source secs mem gz cpu secs OCaml #6 3.36 201,856 1194 3.36 F# .NET #3 1.14 72,032 1361 4.13 F# .NET #4 1.24 90,032 1355 4.62 OCaml #3 4.66 19,796 1075 4.66 k-nucleotide source secs mem gz cpu secs 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 OCaml #3 15.81 258,380 1839 42.53 OCaml 43.82 338,264 894 43.81 OCaml #2 26.57 314,252 1247 60.40 F# .NET 24.10 1,108,380 713 83.78 F# .NET #6 Make Error reverse-complement source secs mem gz cpu secs OCaml 2.23 19,816 1372 5.42 OCaml #3 2.28 19,816 1361 6.06 OCaml #2 9.26 888,064 426 9.26 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 OCaml #5 8.18 213,760 468 8.17 OCaml #2 3.42 217,384 759 9.63 F# .NET 10.25 1,214,512 517 12.10 F# .NET #7 5.26 1,671,736 527 15.45 F# .NET .NET SDK 8.0.200 Host Version: 8.0.2 Commit: 1381d5ebd2 <ServerGarbageCollection>true F# 8.0 OCaml OCaml native-code version 5.1.1 all F# .NET programs & measurements all OCaml programs & measurements