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