Werner Vogels is benchmarking .NET and others with Scimark. The numbers below are approximate gigaflops. Take note at the Rotor column.
Memory Model | Java (IBM 1.3) | C# .Net 1.1 | C | J# | C#-Rotor |
small | 155 | 194 | 327 | 128 | 7 |
large | 92 | 105 | 145 | 105 | 7 |