没有.NET Framework的C＃

Question

Writing fast native applications, with API calls and etc, in a modern cross platform programming language like C# would be awesome, wouldn't it? For example if you want to write a simple utility for helping IT people with installing things, which wouldn't need another components, in an easy and modern programming language? or if you want to write a 3D game, it should be fast, and JIT would just make it slower...

Why, why isn't it possible? Why there are no native modern programming languages for these things?

Answer 1

C# and .Net are native code. I think you misunderstand the JITter. It's not a VM. AC# program is compiled to fully native code before any of it is executed.

Now, the "needing other components" part is a concern. Give it time, though. You'll be hard pressed to find a windows installation these days without at least .Net 2.0, and even a couple mainstream linux distros include mono out of the box.

Answer 2

Don't assume the JIT makes things slower. The JIT can optimize for the exact computer running the application rather than a generic computer like a 386 or Pentium. It can even make better speed/memory trade-off decisions when generating code because it knows exactly what's available. And if JIT still makes things slower, you can NGEN them so that JITting is all done beforehand.

As proof of this, consider that Quake has been ported to the CLR a couple of times, and in my personal tests, the frames per second have been faster when Quake runs on the CLR about half the times I demo it.

Answer 3

已经证明编译的.NET程序运行速度与C一样快。如果您希望它超精简，请将其编译为原生处理器的程序集。

Answer 4

You can use the Microsoft NGEN.EXE tool to create a native image of a .NET assembly. See MSDN NGEN documentation . Microsoft already though about what you're getting at here.

Microsoft also makes ILMERGE.EXE tool to merge multiple assembly files into one. This might border on optimization and speed too.

Answer 5

So, does this mean that we could fully compile and link a C# program using (limited) .NET calls into a standalone EXE that would run without .NET being installed at all?

FYI: Checking a server estate of some 5000 servers revealed about 200 without even .NET 2.0.

This causes problems for code that must run on "all Windows instances". With .NET 4.0+ not including 2.0 this gets worse as both new AND old Windows machines might not have the 'right' .NET

Answer 6

As a side note, Mono has full ahead of time compiling, eliminating the runtime. (I think that's how they get away running on iPhone, which prohibits any JIT.)

Answer 7

有，C。C可以用来写任何应用程序，永远！