.net - At what level C# compiler or JIT optimize the application code?

Question

I want to know this info to reduce my code size so I will not waste my time optimize things that will be done by compiler or JIT.

for example:

if we assume the compiler inline the call to the get function of a property so I do not have to save the return value in a local variable to avoid function call.

I want to recommend a good reference that describes what is going on?

Answer 1

You may want to take a look at these articles:

JIT Optimizations - (Sasha Goldshtein - CodeProject)
Jit Optimizations: Inlining I (David Notario)
Jit Optimizations: Inlining II (David Notario)

To be honest you shouldn't be worrying too much about this level of micro-detail. Let the compiler/JIT'er worry about this for you, it's better at it than you are in almost all cases. Don't get hung up on Premature Optimisation. Focus on getting your code working, then worry about optimisations later on if (a) it doesn't run fast enough, (b) you have 'size' issues.