TargetedPatchingOptOut:"性能的关键跨越NGEN图像边界内联"? [英] TargetedPatchingOptOut: "Performance critical to inline across NGen image boundaries"?
问题描述
已经经历了一些框架类使用反射镜,发现了一些方法和属性有下列属性
Been going through some framework classes using reflector and noticed a number of the methods and properties have the following attribute
[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
我是pretty的肯定,我也看到了上述评论别的地方,从来也没有遵循它。
I'm pretty sure I have also seen the above comment somewhere else and never followed it up.
可能有人请告诉我这是什么意思在C#和其他方面?
Could someone please tell me what this means in the C# and any other context?
推荐答案
它告诉NGEN,这是OK内联它的应用方法,即使在不同的装配。
It tells NGen that it is OK to inline the method it's applied to even in a different assembly.
例如:
-
String.Equals
的[TargetedPatchingOptOut]
- 您编写一个程序,调用
String.Equals
- 您对这个项目的最高性能运行 NGEN
- NGEN将内联
String.Equals
通话,与实际code的方法替换方法调用指令。
方法调用(略)贵,所以这是一个性能提升对于经常调用的方法。
String.Equals
has[TargetedPatchingOptOut]
- You write a program that calls
String.Equals
- You run NGen on this program for maximum performance
- NGen will inline the
String.Equals
call, replacing the method call instruction with the actual code in the method.
Method calls are (slightly) expensive, so this is a performance boost for frequently-called methods.
不过,如果微软发现在 String.Equals
安全漏洞,他们不能只更新 mscorlib.dll中
,因为这会不会影响你刚才NGen'd大会。 (因为它有没有引用原机code String.Equals
)。
我认为,如果这是实际发生的,此安全更新将清零NGEN店。
However, if Microsoft finds a security hole in String.Equals
, they cannot just update mscorlib.dll
, because that won't affect the assembly that you just NGen'd. (Since it has raw machine code without referencing String.Equals
).
I assume that if that were to actually happen, the security update would clear the NGen store.
请注意,此属性仅在.NET框架组件是有用的。你不需要在你自己的。你可以找到这里的更多信息: http://stackoverflow.com/a/14982340/631802
Note that this attribute is only useful in the .NET Framework assemblies. You don't need it in your own. You can find more information about that here: http://stackoverflow.com/a/14982340/631802
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