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What optimizations does the C# compiler perform when you use the /optimize+ compiler option?
Posted 26-Nov-12 20:04pm
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Solution 1

As far as I know, C# code optimization is reduced to the general code optimization common for CLI. Apparently, it depends on the version of CLI. Please see:
http://www.drdobbs.com/net-code-optimization/184416840[^].
 
This is an interesting CodeProject article on JIT optimization: JIT Optimizations[^].
 
—SA
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Solution 2

There are two C# compiler switches that impact code optimization: /optimize and /debug.
The following will shows the imapact these switches have on the quality of the IL Code generated by the C# compiler and the quality of the native code generated by the JIT compiler
 
Compiler Switch Settings : Description
--------------------------------------
/optimize- /debug- : "C# IL code Quality" is UnOptimized and "JIT Native Code Quality" is optimized.
 
/optimize- /debug(+/full/pdbonly) : "C# IL code Quality" is UnOptimized and "JIT Native Code Quality" is Unoptimized.
 
/optimize+ /debug(-/+/full/pdbonly): "C# IL code Quality" is Optimized and "JIT Native Code Quality" is optimized.
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