Just-In-Time compiler

The CLR never executes Common Intermediate Language (CIL) directly. Instead, the Just-In-Time (JIT) compiler translates CIL into optimized x86 native instructions. That’s why using managed code lets your software run in different environments safely and efficiently. In addition, using machine language lets you take full advantage of the features of the processor the application is running on. For example, when the JIT encounters an Intel processor, the code produced takes advantage of hyper-threading technology.

Another advantage of the JIT is improved performance. The JIT learns when the code does multiple iterations. The runtime is designed to be able to retune the JIT compiled code as your program runs.

Versioning essentially eliminates “DLL hell.” When you define an assembly as strongly named, the .NET executable will be executed with the same DLL with which it was built. This means that you can have side-by-side versions of a DLL, However, when an application calls unmanaged DLLs, you can end up back in “DLL hell.”


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Mitesh Mehta
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