Compiler Optimizations
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Where is a discussion of the current and future optimizations that the C# compilers do? When I see things like the following I start to question my faith in csc being good at optimizing. (The same kind of thing shows up in cordbg when looking at the JIT code for a similar example.) % cat y.cs using System; class A { bool On { get { return true; } } public void Print() { if (On) { Console.WriteLine("On"); } } } class ConditionalTest { static void Main() { A a = new A(); a.Print(); } } % csc /optimize+ y.cs Microsoft (R) Visual C# .NET Compiler version 7.10.3052.4 for Microsoft (R) .NET Framework version 1.1.4322 Copyright (C) Microsoft Corporation 2001-2002. All rights reserved. % ildasm y.exe .method public hidebysig instance void Print() cil managed { // Code size 19 (0x13) .maxstack 2 IL_0000: ldarg.0 IL_0001: call instance bool A::get_On() IL_0006: brfalse.s IL_0012 IL_0008: ldstr "On" IL_000d: call void [mscorlib]System.Console::WriteLine(string) IL_0012: ret } // end of method A::Print % At least the compiler eliminates the "if" test when "On" is replaced with "true" in the test.