内存分配为在.NET深继承一个类 [英] Memory allocation for a class that has deep inheritance in .NET

问题描述

如果我有类 A，B，C，D，E ，而像 X，Y，Z 和模型系统，如：

If I have classes A, B, C, D, E, and interfaces like X, Y, Z, and model a system like:

class B : A, X
class C : B, Y
class D : C, Z
class E : D

如果 A 是一个抽象基类和E是类的兴趣，当我创建E的情况下，将它反过来创建<$ C $的实例C> A，B，C，D，X，Y，Z 除了电子？

If A is an abstract base class and E is the class of interest, when I create an instance of E, would it in turn create instances of A, B, C, D, X, Y, Z in addition to E?

如果是这样的话，这将创造一个巨大的性能开销？不是记忆，而是运行时间和GC明智的。

If that's the case, would this create a huge performance overhead? Not memory, but runtime and GC wise.

推荐答案

是的，这将造成A，B，C和D
嵌入式的实例 不，它不会创建X，Y和Z实例（因为它们是接口）

Yes, it would create 'embedded' instances of A, B, C and D
No, it would not create instances of X, Y and Z (because they are interfaces)

没有为内存分配或GC（ABCD的），因为E的实例被分配为1块不需要额外的开销。任何运行时开销将完全取决于所涉及的构造。

There is no extra overhead for the memory allocation or GC (of ABCD) because the instance of E is allocated as 1 block. Any runtime overhead would entirely depend on the constructors involved.

总会有一个链contructors（从E到A）执行，可能是默认的构造函数，但它也可以调用多个构造函数在1的水平。

There will always be a chain of contructors (from E to A) being executed, possibly the default constructor but it's also possible to call multiple constructors at 1 level.

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