|
|
|
•The diagram above illustrates the process used to compile
and execute managed code, that is, code that uses the CLR.
|
|
•Source code written in C#, VB.NET, or some other language
that targets the CLR is first transformed into MSIL by the appropriate
language compiler.
|
|
•Before execution, this MSIL is JIT compiled into native
code for whatever processor the code will run on.
|
|
•The default is to JIT compile each method when it is first
called, but it’s also possible to “pre-JIT” the MSIL. With this option, all
methods are compiled before the application is loaded, so the overhead of JIT
compilation on each initial method call is avoided.
|
|
•One point worth noting is that all languages targeting the
CLR should exhibit roughly the same performance. While some compilers may
produce better MSIL code than others, large variations in execution speed are
unlikely.
|
|
|
|
|