OCaml versus F# .NET fastest programs Always look at the source code. These are only the fastest programs. Do some of them use manually vectorized SIMD? Look at the other programs. They may seem more-like a fair comparison to you. binary-trees source secs mem gz busy cpu load OCaml 4.68 152,716 751 13.23 78% 99% 42% 64% F# .NET 6.06 1,469,616 516 16.18 63% 69% 62% 72% regex-redux source secs mem gz busy cpu load OCaml 2.37 510,132 647 4.12 72% 1% 100% 1% F# .NET 2.85 1,301,192 611 7.36 51% 92% 59% 56% fannkuch-redux source secs mem gz busy cpu load OCaml 8.66 18,900 1004 34.60 100% 100% 100% 100% F# .NET 8.65 31,784 1097 33.57 98% 99% 94% 98% pidigits source secs mem gz busy cpu load OCaml 0.89 5,968 593 0.90 0% 0% 1% 100% F# .NET 0.82 34,428 905 0.83 1% 2% 96% 1% reverse-complement source secs mem gz busy cpu load OCaml 1.68 34,024 1368 4.31 56% 57% 75% 69% F# .NET 1.51 1,030,852 1140 4.19 93% 36% 58% 91% n-body source secs mem gz busy cpu load OCaml 6.70 1,468 1251 6.70 100% 0% 0% 0% F# .NET 5.07 35,072 1383 5.18 1% 99% 1% 1% mandelbrot source secs mem gz busy cpu load OCaml 7.53 4,480 717 30.02 100% 100% 100% 100% F# .NET 3.77 64,912 933 14.73 99% 97% 98% 97% fasta source secs mem gz busy cpu load OCaml 3.28 203,300 1189 3.29 0% 0% 100% 0% F# .NET 1.14 120,528 1350 4.18 94% 94% 89% 91% spectral-norm source secs mem gz busy cpu load OCaml 5.36 3,448 377 5.36 0% 0% 0% 100% F# .NET 1.55 31,916 853 5.83 92% 98% 93% 93% k-nucleotide source secs mem gz busy cpu load OCaml 15.09 255,396 1833 40.72 38% 94% 64% 74% F# .NET 3.65 184,680 1907 12.58 94% 84% 85% 83% OCaml The OCaml native-code compiler, version 4.12.0 F# .NET .NET SDK 5.0.100 Host Version: 5.0.0; Commit: cf258a14b7 <ServerGarbageCollection>true</ServerGarbageCollection> all OCaml programs & measurements all F# .NET programs & measurements