What optimizations does the C# compiler perform when you use the /optimize+ compiler option?

Question:What optimizations does the C# compiler perform when you use the /optimize+ compiler option??

Answer: </P><P align=justify>The following is a response from a developer on the C# compiler team: </P><P align=justify>We get rid of unused locals (i.e., locals that are never read, even if assigned).</P><P align=justify>We get rid of unreachable code.</P><P align=justify>We get rid of try-catch w/ an empty try.</P><P align=justify>We get rid of try-finally w/ an empty try (convert to normal code...).</P><P align=justify>We get rid of try-finally w/ an empty finally (convert to normal code...).</P><P align=justify>We optimize branches over branches: </P><P align=justify>gotoif A, lab1</P><P align=justify>goto lab2:</P><P align=justify>lab1:</P><P align=justify></P><P align=justify>turns into: gotoif !A, lab2</P><P align=justify>lab1:</P><P align=justify></P><P align=justify>We optimize branches to ret, branches to next instruction, and branches to branches.

Tags:Interview Questions, Microsoft, C#,

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