IL级别的Expression主体语法与Getter语法之间有什么区别？ [英] What is the difference between Expression bodied syntax vs Getter syntax on IL level?

问题描述

我想稍微了解一下IL代码。

I would like to understand the IL code a bit.

因此，如您所见，表达式体式的代码少于GetOld代码。

So as you see the expression bodied has less code than the GetOld code. Is it some optimization done there and means expression body syntax is more performant?

还是真的没有关系吗？

namespace DatabaseModules {
    public class Test {
        public IList<string> _cache = new List<string>();

        public Test() {

        }

        public IList<string> Get => _cache;

        public IList<string> GetOld {
            get { return _cache; }
        }
    }
}

以及生成的IL代码使用DotPeek

And the generated IL Code using DotPeek

https：//gist.github .com / anonymous / 9673389a1a21d0ad8122ec97178cfd9a

推荐答案

没有。该代码编译成完全相同的C＃使用罗斯林，所以IL的不同：

There is none. That code compiles to the exact same C# using Roslyn, so the IL is no different:

using System.Runtime.CompilerServices;
using System.Security;
using System.Security.Permissions;

[assembly: AssemblyVersion("0.0.0.0")]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.Default | DebuggableAttribute.DebuggingModes.DisableOptimizations | DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints | DebuggableAttribute.DebuggingModes.EnableEditAndContinue)]
[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: SecurityPermission(SecurityAction.RequestMinimum, SkipVerification = true)]
[module: UnverifiableCode]
namespace DatabaseModules
{
    public class Test
    {
        public IList<string> _cache = new List<string>();

        public IList<string> Get
        {
            get
            {
                return this._cache;
            }
        }

        public IList<string> GetOld
        {
            get
            {
                return this._cache;
            }
        }
    }
}

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