C# .NET versus C++ g++ 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. fannkuch-redux source secs mem gz busy cpu load C# .NET 8.40 30,788 1225 33.30 100% 99% 99% 99% C++ g++ 8.08 1,900 980 31.45 98% 100% 98% 93% spectral-norm source secs mem gz busy cpu load C# .NET 0.82 34,720 764 2.98 91% 88% 89% 98% C++ g++ 0.72 1,216 1044 2.86 100% 100% 99% 100% n-body source secs mem gz busy cpu load C# .NET 4.86 32,760 1742 4.96 0% 1% 100% 2% C++ g++ 4.09 1,800 1808 4.13 100% 0% 0% 0% regex-redux source secs mem gz busy cpu load C# .NET 1.43 320,400 1869 2.67 33% 39% 85% 31% C++ g++ 1.08 203,816 1315 3.38 78% 99% 65% 73% pidigits source secs mem gz busy cpu load C# .NET 0.83 31,700 1168 1.02 1% 2% 21% 98% C++ g++ 0.60 4,944 986 2.38 100% 100% 98% 100% fasta source secs mem gz busy cpu load C# .NET 1.16 96,136 1691 4.31 96% 95% 92% 89% C++ g++ 0.78 2,468 2751 1.62 8% 99% 99% 3% k-nucleotide source secs mem gz busy cpu load C# .NET 3.28 182,680 2044 11.09 87% 83% 73% 94% C++ g++ 1.95 156,372 1631 5.95 73% 70% 92% 70% binary-trees source secs mem gz busy cpu load C# .NET 2.35 807,172 753 7.82 83% 88% 84% 78% C++ g++ 1.04 154,824 1122 3.74 88% 100% 88% 86% reverse-complement source secs mem gz busy cpu load C# .NET 1.48 959,848 1310 4.18 30% 63% 93% 96% C++ g++ 0.63 499,704 2093 0.64 0% 100% 2% 0% mandelbrot source secs mem gz busy cpu load C# .NET 3.14 64,716 1974 12.28 99% 97% 97% 97% C++ g++ 0.84 34,604 3542 3.28 98% 99% 98% 95% C# .NET .NET SDK 5.0.100 Host Version: 5.0.0; Commit: cf258a14b7 <ServerGarbageCollection>true C++ g++ g++ (Ubuntu 10.2.0-13ubuntu1) 10.2.0 all C# .NET programs & measurements all C++ g++ programs & measurements