What is Jit compilers?.How many are available in CLR?

Just-In-Time(Jit) compiler- it converts the language that we write in .Net into machine language that a computer can understand. JIT compiler is a part of the runtime execution environment.
There are three types of JIT compilers:

1. Pre-JIT : Pre-JIT compiles complete source code into native code in a single compilation cycle. This is done at the time of deployment of the application.

2. Econo-JIT: Econo-JIT compiles only those methods that are called at runtime. However, these complied methods are removed when they are not required.

3. Normal-JIT: Normal-JIT compiles only those methods that are called at runtime. These methods compiled the first time they are called, and then they are stored in a cache. When the same methods are called again, the compiled code from cache is used for execution.