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c# Programming Glossary: ilPerformance difference for control structures 'for' and 'foreach' in C# http://stackoverflow.com/questions/1124753/performance-difference-for-control-structures-for-and-foreach-in-c-sharp foreach object o in list Console.WriteLine o Produces IL of .method private hidebysig static void IterateOverList class.. System.Collections.Generic.List`1 Enumerator object V_1 IL_0000 ldarg.0 IL_0001 callvirt instance valuetype mscorlib System.Collections.Generic.List`1.. Enumerator object V_1 IL_0000 ldarg.0 IL_0001 callvirt instance valuetype mscorlib System.Collections.Generic.List`1..
Understanding Garbage Collection in .net http://stackoverflow.com/questions/17130382/understanding-garbage-collection-in-net jitter performs two important duties when it compiles the IL for a method into machine code. The first one is very visible..
Does using “new” on a strict allocate it on the heap or stack? http://stackoverflow.com/questions/203695/does-using-new-on-a-strict-allocate-it-on-the-heap-or-stack the compiler does with the source code in terms of the IL it creates. It's more than possible that the JIT compiler will.. Guid someString . These generate significantly different IL. To understand why you need to compare the C# and CLI specs.. to do with the value after you've initialized it. The IL used for Guid localVariable new Guid someString is different..
Will using 'var' affect performance? http://stackoverflow.com/questions/356846/will-using-var-affect-performance saw that var gets compiled down to the correct type in the IL you'll see it about midway down article . My question is how.. midway down article . My question is how much more if any IL code does using the 'var' keyword take and would it be even.. share improve this question There's no extra IL code for the var keyword the resulting IL should be identical..
Is there any significant difference between using if/else and switch-case in C#? http://stackoverflow.com/questions/395618/is-there-any-significant-difference-between-using-if-else-and-switch-case-in-c look of your code. Is there any reason why the resulting IL or associated runtime performance would be radically different.. In release it will be compiled into jump table through MSIL 'switch' statement which is O 1 . C# unlike many other languages..
Performance differences between debug and release builds http://stackoverflow.com/questions/4043821/performance-differences-between-debug-and-release-builds question The C# compiler itself doesn't alter the emitted IL a great deal in the Release build. Notable is that it no longer..
What is the difference between const and readonly? http://stackoverflow.com/questions/55984/what-is-the-difference-between-const-and-readonly a find replace the value 2 is 'baked into' the AssemblyB's IL. This means that tomorrow if I update I_CONST_VALUE to 20 in.. a memory location. The value is not baked into AssemblyB's IL. This means that if the memory location is updated Assembly..
What is differences between Multidimensional array and Array of Arrays in C#? http://stackoverflow.com/questions/597720/what-is-differences-between-multidimensional-array-and-array-of-arrays-in-c ones and then will inspect compiled assembly with IL disassembler you will see that storage and retrieval from jagged.. from jagged or single dimensional arrays are simple IL instructions while same operations for multidimensional arrays.. int array int i int j int value array i j value Their IL will be the following .method private hidebysig static void..
Why would you use Expression<Func<T>> rather than Func<T>? http://stackoverflow.com/questions/793571/why-would-you-use-expressionfunct-rather-than-funct int myAnonMethod return 10 will effectively compile to an IL method that gets nothing and returns 10. Expression Func int..
Retrieving the name of the the invoked method executed in a Func http://stackoverflow.com/questions/1225642/retrieving-the-name-of-the-the-invoked-method-executed-in-a-func string ExtractMethodName Func MyObject object func var il func.Method.GetMethodBody .GetILAsByteArray first byte is ldarg.0.. next four bytes are the MethodDef token var mdToken il 5 24 il 4 16 il 3 8 il 2 var innerMethod func.Method.Module.ResolveMethod.. four bytes are the MethodDef token var mdToken il 5 24 il 4 16 il 3 8 il 2 var innerMethod func.Method.Module.ResolveMethod..
http://stackoverflow.com/questions/15864670/generate-tail-call-opcode tail call opcode Out of curiosity I was trying to generate a tail.. call opcode Out of curiosity I was trying to generate a tail call opcode using C#. Fibinacci is an easy one so my c# example.. i int acc if i 0 return acc return Fib i 1 acc i If I build it in release and run it without debugging I do not get a stack..
Comparing 2 objects and retrieve a list of fields with different values http://stackoverflow.com/questions/3060382/comparing-2-objects-and-retrieve-a-list-of-fields-with-different-values than I would normally go to but this might be a useful utility method. It creates IL on the fly cached to do the work handling.. to do the work handling value type vs ref type objects inbuilt IL equality equality operators and EqualityComparer T for the.. typeof List string new typeof T typeof T typeof T var il dyn.GetILGenerator il.Emit OpCodes.Newobj typeof List string..
How to invoke (non virtually) the original implementation of a virtual method? http://stackoverflow.com/questions/3378010/how-to-invoke-non-virtually-the-original-implementation-of-a-virtual-method but using the MethodInfo that I get from typeof A still generates a virtual call calling C 's implementation with subsequent.. DynamicMethod proxy typeof void new typeof C typeof C var il dm.GetILGenerator il.Emit OpCodes.Ldarg_0 il.Emit OpCodes.Call.. typeof void new typeof C typeof C var il dm.GetILGenerator il.Emit OpCodes.Ldarg_0 il.Emit OpCodes.Call m il.Emit OpCodes.Ret..
SQLite .NET performance, how to speed up things? http://stackoverflow.com/questions/4356363/sqlite-net-performance-how-to-speed-up-things 20 minutes means ~70 insertions per second. I have to do millions how can I speed up it Calling Open and Close on SQLiteConnection.. int rank double score Apre la connessione e imposta il comando connection.Open command.CommandText INSERT OR IGNORE.. rank command.Parameters.AddWithValue @Score score Ottieni il risultato e chiudi la connessione int retval command.ExecuteNonQuery..
Viewing the IL code generated from a compiled expression http://stackoverflow.com/questions/4764242/viewing-the-il-code-generated-from-a-compiled-expression the IL code generated from a compiled expression Is it possible to view the IL code generated when.. possible to view the IL code generated when you call Compile on an Expression tree Consider this very simple example class.. lambda Expression.Lambda Action Program assign param .Compile Program p new Program lambda p p.Value 5 Now the expression..
http://stackoverflow.com/questions/601974/clr-vs-jit vs JIT What is the difference between the JIT compiler and CLR If you compile your code to il and CLR runs that code.. the difference between the JIT compiler and CLR If you compile your code to il and CLR runs that code then what is the JIT.. the JIT compiler and CLR If you compile your code to il and CLR runs that code then what is the JIT doing How has JIT..
http://stackoverflow.com/questions/7080737/missingmanifestresourceexception-when-running-tests-after-building-with-msbuild when running tests after building with MSBuild .mresource has path in manifest I am having.. when running tests after building with MSBuild .mresource has path in manifest I am having a problem with.. a problem with embedded resources for a C# project on a build server using MSBuild on the command line. The project works..
Looking for a fast and easy way to coalesce all properties on a POCO http://stackoverflow.com/questions/7422861/looking-for-a-fast-and-easy-way-to-coalesce-all-properties-on-a-poco Field2 get set ... etc ... I've got a scenario where I'm building these POCOs piecemeal and at the end I'd like to get one.. like to get one of them with all the non null fields. Some illustrative code POCO o1 LoadFields1To3 POCO o2 LoadFields4To5.. are loaded from SQL and sometimes distinct queries while some are loaded from in memory data structures. I'm re using..
Why is the C# compiler emitting a callvirt instruction for a GetType() method call? http://stackoverflow.com/questions/845657/why-is-the-c-sharp-compiler-emitting-a-callvirt-instruction-for-a-gettype-meth is the C# compiler emitting a callvirt instruction for a GetType method call.. mscorlib System.Object GetType Why did the compiler emit a callvirt for the first section but a call for the second.. for the second section Is there any reason that the compiler would ever emit a callvirt instruction for a non virtual method..
In C#, what happens when you call an extension method on a null object? http://stackoverflow.com/questions/847209/in-c-what-happens-when-you-call-an-extension-method-on-a-null-object is this a null reference exception If this is the case I will never need to check my 'this' parameter for null c# parameters.. extension methods share improve this question That will work fine no exception . Extension methods don't use virtual.. methods don't use virtual calls i.e. it uses the call il instruction not callvirt so there is no null check unless you..
How can I write a generic container class that implements a given interface in C#? http://stackoverflow.com/questions/847809/how-can-i-write-a-generic-container-class-that-implements-a-given-interface-in-c No code generation that is no real textual code at compile time The interface has only void methods with or without arguments.. or signature updates to the IStartable interface will lead to manual changes in the group container class Learning.. an AssemblyBuilderAccess.RunAndSave string moduleName Path.ChangeExtension an.Name..
http://stackoverflow.com/questions/9271805/net-module-vs-assembly VS.100 .aspx the msdn diagram implies that a single file assembly does not comprise of a module but rather of a manifest.. does not comprise of a module but rather of a manifest il code type metadata etc. This is different than many other articles.. many other articles i've read which states that a single file assembly has one module. What is the answer If the answer is..
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