Are there scenarios where JIT compiler is faster than other compilers like C++? Do you think in the future JIT compiler will just see minor optimizations, features but follow a similar performance, or will there be breakthroughs that will make it infinitely superior to other compilers? It looks like the multi core paradigm has some pro...
This article suggests otherwise. But there is still a need to evaluate the loop condition. Does java just employ a specific trick to recognize this case? ...
I don't really know much about the internals of compiler and JIT optimizations, but I usually try to use "common sense" to guess what could be optimized and what couldn't. So there I was writing a simple unit test method today: @Test // [Test] in C# public void testDefaultConstructor() { new MyObject(); } This method is actually ...
Hello. I was thinking of trying my hand at some jit compilataion (just for the sake of learning) and it would be nice to have it work cross platform since I run all the major three at home (windows, os x, linux). With that in mind, I want to know if there is any way to get out of using the virtual memory windows functions to allocate mem...
What is 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 doing? How has JIT compilation changed with the addition of generics to the CLR? ...
Hi, I'm writing my own scripting language in C#, with some features I like, and I chose to use MSIL as output's bytecode (Reflection.Emit is quite useful, and I dont have to think up another bytecode). It works, emits executable, which can be run ( even decompiled with Reflector :) )and is quite fast. But - I want to run multiple 'proce...
What unusual, unexpected consequences have occurred in terms of performance, memory, etc when switching from running your .NET applications under the 64 bit JIT vs. the 32 bit JIT? I'm interested in the good, but more interested in the surprisingly bad issues people have run into. I am in the process of writing a new .NET application w...
I want to know this info to reduce my code size so I will not waste my time optimize things that will be done by compiler or JIT. for example: if we assume the compiler inline the call to the get function of a property so I do not have to save the return value in a local variable to avoid function call. I want to recommend a good ref...
When you write an application in C#, and then run it, will it not be compiled again next time it's run, or everything that's used is gonna be recompiled every time the application starts up? How does JIT compiling works for caching? ...
How does JIT know where to look for csc.exe? Also how is this handled by other .NET languages, like IronRuby? ...
I have an ASP.NET 2.0 application (installed on IIS 6.0 from an MSI) which was compiled as a "web site", and precompiled/packaged using a web deployment project, in Visual Studio 2005. (I have put in a request to the developers to consider changing to a web application for the next version, but it won't change for this version). Whenev...
When running a .NET 2.0 WinForms app in a Terminal Services environment, I'm seeing some unexpected results that I can't quite explain. Everything I have read has indicated that JIT'ed assemblies (i.e., not using NGen to create native images) result in all code space being stored in private pages, increasing working set size / memory pr...
I'm writing a DSP application in C# (basically a multitrack editor). I've been profiling it for quite some time on different machines and I've noticed some 'curious' things. On my home machine, the first run of the playback loop takes up about 50%-60% of the available time, (I assume it's due to the JIT doing its job), then for the sub...
Is anyone using JIT tricks to improve the runtime performance of statically compiled languages such as C++? It seems like hotspot analysis and branch prediction based on observations made during runtime could improve the performance of any code, but maybe there's some fundamental strategic reason why making such observations and impleme...
In a C# constructor, that ends up with a call to this(...), the actual call gets translated to this: 0000003d call dword ptr ds:[199B88E8h] What is the DS register contents here? I know it's the data-segment, but is this call through a VMT-table or similar? I doubt it though, since this(...) wouldn't be a call to a virtual met...
I came across this quote: "The .NET Common Language Runtime (CLR) supplies at least one JIT compiler for every NET-supported computer architecture, so the same set of CIL can be JIT-compiled and run on different architectures." I've looked around but can't find a definitive list of the JIT compilers supported by CLR? ...
No The JIT compiler may "transform" the bytecode into something completely different anyway. It will lead you to do premature optimization. Yes You do not know which method will be compiled by the JIT, so it is better if you optimize them all. It will make you a better Java programmer. I am asking without really knowing (obviou...
The "yield" statement in python allows simple iteration from a procedure, and it also means that sequences don't need to be pre-calculated AND stored in a array of "arbitrary" size. Is there a there a similar way of iterating (with yield) from a C procedure? ...
I'm looking for smallest CLI subset implementation possible. For now, even an interpreter will do, but I am really looking for a JITted runtime. I do not even need anything from the standard runtime apart from core classes like System.Object and Enum etc. It also needs to be portable and least dependent on underlying system. I hav...
I have a function that I want to be sure is compiled JIT (i.e. right before it's called). Are there attributes or assembly settings that will ensure this? If not, then how can I guarantee that a function is compiled JIT? Thanks! EDIT: I want to do this to prevent my application from crashing due to a missing referenced assembly. If my...