Cross .NET Languages Performances

Question

Does using Multiple .NET Languages (Delphi, VB.NET, C#) into the same application (but in differents class library of course) can down peformances compared to a full C# application for example ?

Answer 1

I'm not an expert on the CLR, but I would guess that you will have very similar performance. All the languages compile to MSIL which runs on the CLR. There could be differences in performance depending on the MSIL generated from the compilers. i.e. It's possible that similar code in VB.NET would compile to less (or more) optimized MSIL than the C# compiler.

Answer 2

Although I don't have any benchmarks off hand, I would say that for the most part it shouldn't. Those different languages all compile the code into CIL, so you should be fine.

One place where this would be different is with the languages that are run on the DLR (IronPython, IronRuby, etc.). They're compiling in the use of some features that aren't present in the CLR and that are more costly operations.