F# .NET Core versus C# .NET Core fastest programs Always look at the source code. These are only the fastest programs. Look at the other programs. They may seem more-like a fair comparison to you. reverse-complement source secs mem gz busy cpu load F# .NET Core 2.93 1,031,696 1140 8.52 94% 45% 60% 90% C# .NET Core 3.16 1,029,156 1621 7.90 57% 77% 63% 53% fasta source secs mem gz busy cpu load F# .NET Core 1.70 138,596 1350 6.45 95% 98% 93% 93% C# .NET Core 1.69 75,044 1691 6.28 90% 91% 96% 95% pidigits source secs mem gz busy cpu load F# .NET Core 1.87 35,692 905 2.01 4% 2% 4% 98% C# .NET Core 1.86 33,240 1168 2.35 2% 20% 5% 99% n-body source secs mem gz busy cpu load F# .NET Core 22.20 33,660 1290 23.03 0% 100% 1% 3% C# .NET Core 21.74 34,000 1305 22.85 0% 0% 32% 73% k-nucleotide source secs mem gz busy cpu load F# .NET Core 5.80 183,360 1907 19.47 86% 66% 88% 96% C# .NET Core 5.63 184,992 2044 19.00 80% 88% 96% 73% mandelbrot source secs mem gz busy cpu load F# .NET Core 5.78 65,644 933 22.72 99% 98% 98% 98% C# .NET Core 5.60 65,320 816 22.00 98% 97% 99% 99% binary-trees source secs mem gz busy cpu load F# .NET Core 6.28 724,124 635 22.76 91% 93% 90% 88% C# .NET Core 5.77 844,952 753 20.47 93% 87% 89% 86% fannkuch-redux source secs mem gz busy cpu load F# .NET Core 16.68 35,816 1097 65.52 98% 97% 100% 98% C# .NET Core 11.41 32,388 1225 45.24 99% 100% 99% 99% spectral-norm source secs mem gz busy cpu load F# .NET Core 4.29 35,228 853 16.12 92% 92% 97% 94% C# .NET Core 2.16 35,800 764 8.21 94% 93% 99% 94% regex-redux source secs mem gz busy cpu load F# .NET Core 7.87 971,632 599 11.18 64% 37% 28% 13% C# .NET Core 2.82 365,156 1869 4.97 27% 86% 26% 38% F# .NET Core .NET Core SDK 3.1.201 Host Version: 3.1.3; Commit: 4a9f85e9f8 <ServerGarbageCollection>true <ConcurrentGarbageCollection>true C# .NET Core .NET Core SDK 3.1.201 Host Version: 3.1.3; Commit: 4a9f85e9f8 <ServerGarbageCollection>true <ConcurrentGarbageCollection>true all F# .NET Core programs & measurements all C# .NET Core programs & measurements