c# - CallerMemberName/CallerFilePathAttribute/CallerLineNumber 对性能的影响

Question

使用CallerMemberName/CallerFilePathAttribute/CallerLineNumber属性如何影响应用程序的性能？这是在应用程序中编译的东西，还是相关反射的东西，还是其他东西？

我计划做类似的事情:

public void DoProcessing()
{
    TraceMessage("Something happened.");
}

public void TraceMessage(string message,
        [System.Runtime.CompilerServices.CallerMemberName] string memberName = "",
        [System.Runtime.CompilerServices.CallerFilePath] string sourceFilePath = "",
        [System.Runtime.CompilerServices.CallerLineNumber] int sourceLineNumber = 0)
{
    System.Diagnostics.Trace.WriteLine("message: " + message);
    System.Diagnostics.Trace.WriteLine("member name: " + memberName);
    System.Diagnostics.Trace.WriteLine("source file path: " + sourceFilePath);
    System.Diagnostics.Trace.WriteLine("source line number: " + sourceLineNumber);
}

https://learn.microsoft.com/en-us/dotnet/api/system.runtime.compilerservices.callermembernameattribute?view=net-7.0&redirectedfrom=MSDN

Answer 1

此属性由编译器处理，即 TraceMessage("Something gone."); 将被编译器替换为如下内容:

TraceMessage("Something happened.", "DoProcessing", "some_file_path", 6);

可以查看反编译@sharplab

Is this something that gets compiled in the application

是的

or something related reflection, or something else?

不，没有反射。