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c# Programming Glossary: jitPerformance surprise with “as” and nullable types http://stackoverflow.com/questions/1583050/performance-surprise-with-as-and-nullable-types share improve this question Clearly the machine code the JIT compiler can generate for the first case is much more efficient... that has the same type as the boxed value. That allows the JIT compiler to generate very efficient code no value conversions.. a few machine code instructions. The cast is also easy the JIT compiler knows the location of the value bits in the object..
Understanding Garbage Collection in .net http://stackoverflow.com/questions/17130382/understanding-garbage-collection-in-net Tools Options Debugging General and untick the Suppress JIT optimization option. Now run your program again and tinker with..
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 of the IL it creates. It's more than possible that the JIT compiler will do clever things in terms of optimising away quite..
http://stackoverflow.com/questions/246697/windows-service-and-timer long running method KeepAlive must be used to prevent the JIT compiler from allowing aggressive garbage collection to occur..
Performance differences between debug and release builds http://stackoverflow.com/questions/4043821/performance-differences-between-debug-and-release-builds brace. The big one is the optimizer that's built into the JIT compiler. I know it makes the following optimizations Method.. .NET collection classes use an array internally . When the JIT compiler can verify that a loop never indexes an array out of.. to constant folding and inlining. Other cases is where the JIT compiler can determine that the code has no possible side effect...
Why doesn't .NET/C# optimize for tail-call recursion? http://stackoverflow.com/questions/491376/why-doesnt-net-c-optimize-for-tail-call-recursion tail recursion share improve this question JIT compilation is a tricky balancing act between not spending too.. have bugs where the behaviour is dependent on whether the JIT or ngen was responsible for the machine code. The CLR itself.. must know how to generate the relevant opcode and the JIT must be willing to respect it. F#'s fsc will generate the relevant..
Calling null on a class vs Dispose() http://stackoverflow.com/questions/574019/calling-null-on-a-class-vs-dispose to no longer be needed. When it's a local variable the JIT is usually smart enough in release mode to know when you're.. foo.DoSomething We're not going to need it again but the JIT wouldn't spot that foo null else Some other code Implementing..
http://stackoverflow.com/questions/755685/c-static-readonly-vs-const call... ...which might sometimes have been inlined by the JIT anyway If the value will never change then const is fine Zero..
http://stackoverflow.com/questions/786383/c-sharp-events-and-thread-safety multithreading events share improve this question The JIT isn't allowed to perform the optimization you're talking about..
Why does adding local variables make .NET code slower http://stackoverflow.com/questions/10369421/why-does-adding-local-variables-make-net-code-slower 1 00000047 lea edx rbx rax c# .net performance compiler jit share improve this question Question should be Why do I..
Read Introduction in C# - how to protect against it? http://stackoverflow.com/questions/14799876/read-introduction-in-c-sharp-how-to-protect-against-it x86 x64 chips have a strong memory model and the jit compilers are not aggressive in this area they will not do this.. you say the compiler which compiler do you mean I mean the jit compiler. The C# compiler never introduces reads in this manner... introduction optimizations are not performed. However the jitter is far less aggressive about pursuing optimizations that..
Is there a way to see the native code produced by theJITter for given C# / CIL? http://stackoverflow.com/questions/1945719/is-there-a-way-to-see-the-native-code-produced-by-thejitter-for-given-c-sharp we can try as humble applications programmers c# .net jit cil share improve this question You won't get meaningful..
http://stackoverflow.com/questions/2056948/net-jit-potential-error string args Test new DoSomething Console.ReadLine c# jit share improve this question It is a JIT optimizer bug. It.. in August 2012 this bug was fixed in the version 4.0.30319 jitter. But is still present in the v2.0.50727 jitter. It seems.. 4.0.30319 jitter. But is still present in the v2.0.50727 jitter. It seems unlikely they'll fix this in the old version after..
Are these objects's references on the Stack or on the Heap? http://stackoverflow.com/questions/2559271/are-these-objectss-references-on-the-stack-or-on-the-heap stack at all. It totally depends on how the authors of the jit compiler decided to implement the IL semantics. share improve..
Does the .NET garbage collector perform predictive analysis of code? http://stackoverflow.com/questions/3161119/does-the-net-garbage-collector-perform-predictive-analysis-of-code What's happening exactly c# .net garbage collection jit share improve this question The Garbage Collector relies..
C# Dynamic Keyword ??Run-time penalty? http://stackoverflow.com/questions/3784317/c-sharp-dynamic-keyword-run-time-penalty that lambda into dynamically generated IL which the jit compiler then jits. The DLR then caches that compiled state.. into dynamically generated IL which the jit compiler then jits. The DLR then caches that compiled state so that the second..
Preventing JIT inlining on a method http://stackoverflow.com/questions/5169219/preventing-jit-inlining-on-a-method inlining so your method will show up in a stack trace c# jit inlining share improve this question You could use MethodImplAttribute..
How do generics get compiled by the JIT compiler? http://stackoverflow.com/questions/5342345/how-do-generics-get-compiled-by-the-jit-compiler code generation and semantic check c# generics compiler jit share improve this question I recommend reading Generics..
JIT compiler vs offline compilers http://stackoverflow.com/questions/538056/jit-compiler-vs-offline-compilers it's not universal magic. Any insights c# .net c compiler jit share improve this question Yes there certainly are such..
http://stackoverflow.com/questions/601974/clr-vs-jit with the addition of generics to the CLR c# compiler clr jit share improve this question The JIT is one aspect of the..
At what level C# compiler or JIT optimize the application code? http://stackoverflow.com/questions/650652/at-what-level-c-sharp-compiler-or-jit-optimize-the-application-code describes what is going on c# .net optimization compiler jit share improve this question You may want to take a look..
http://stackoverflow.com/questions/6928442/retrieve-jit-output instructions . Is there a good way to do this c# .net clr jit .net assembly share improve this question You should use..
Is it possible to write a JIT compiler (to native code) entirely in a managed .NET language http://stackoverflow.com/questions/9557293/is-it-possible-to-write-a-jit-compiler-to-native-code-entirely-in-a-managed-n how do you jump into it to begin execution c# .net f# jit share improve this question And for the full proof of concept.. Marshal.Copy JITcode 0 executableMemory JITcode.Length let jitedFun Marshal.GetDelegateForFunctionPointer executableMemory.. mutable test 0xFFFFFFFCu printfn Value before X test test jitedFun.Invoke test printfn Value after X test VirtualFree executableMemory..
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