Haskell GHC 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. regex-redux source secs mem gz busy cpu load Haskell GHC 1.07 345,128 2213 2.47 59% 44% 44% 83% F# .NET 2.85 1,301,192 611 7.36 51% 92% 59% 56% mandelbrot source secs mem gz busy cpu load Haskell GHC 1.51 37,504 1975 5.98 99% 99% 99% 99% F# .NET 3.77 64,912 933 14.73 99% 97% 98% 97% fasta source secs mem gz busy cpu load Haskell GHC 0.88 7,628 1882 3.32 94% 96% 93% 93% F# .NET 1.14 120,528 1350 4.18 94% 94% 89% 91% binary-trees source secs mem gz busy cpu load Haskell GHC 5.02 449,868 811 18.05 90% 85% 93% 91% F# .NET 6.06 1,469,616 516 16.18 63% 69% 62% 72% spectral-norm source secs mem gz busy cpu load Haskell GHC 1.47 3,964 987 5.71 97% 97% 97% 97% F# .NET 1.55 31,916 853 5.83 92% 98% 93% 93% pidigits source secs mem gz busy cpu load Haskell GHC 0.83 6,056 928 0.84 0% 99% 1% 1% F# .NET 0.82 34,428 905 0.83 1% 2% 96% 1% fannkuch-redux source secs mem gz busy cpu load Haskell GHC 9.95 3,764 1113 39.18 95% 100% 99% 100% F# .NET 8.65 31,784 1097 33.57 98% 99% 94% 98% n-body source secs mem gz busy cpu load Haskell GHC 6.42 4,176 1883 6.47 0% 0% 0% 100% F# .NET 5.07 35,072 1383 5.18 1% 99% 1% 1% reverse-complement source secs mem gz busy cpu load Haskell GHC 3.36 501,696 1041 3.97 6% 100% 6% 6% F# .NET 1.51 1,030,852 1140 4.19 93% 36% 58% 91% k-nucleotide source secs mem gz busy cpu load Haskell GHC 22.02 638,132 1486 85.78 97% 99% 97% 97% F# .NET 3.65 184,680 1907 12.58 94% 84% 85% 83% Haskell GHC The Glorious Glasgow Haskell Compilation System, version 9.0.1 F# .NET .NET SDK 5.0.100 Host Version: 5.0.0; Commit: cf258a14b7 <ServerGarbageCollection>true</ServerGarbageCollection> all Haskell GHC programs & measurements all F# .NET programs & measurements