使用this->是否有任何开销?访问会员? [英] Is there any overhead using this-> for accessing a member?

问题描述

访问某个类的成员时，我可以使用例如:

  this-> myVar = 10 

或者我可以写:

  myVar = 10 

我喜欢使用 this-> ，因为它显式声明了该变量是该类的成员，但是与仅使用变量名本身相比，它是否会引起任何开销?/p>

作为替代方案，我可以在var中添加一个唯一的前缀，例如 _TmyVar ，但是我已经使用了 this-> 很长时间了，所以我只是想知道.

解决方案

没有任何开销.编译器将为两个版本生成完全相同的代码.

When accessing a member of some class, I can use e.g.:

this->myVar = 10 

or I can just write:

myVar = 10

I like to use this-> because it explicitly declares that the variable is a member of this class, but does it cause any overhead in comparison to just using the variable name by itself?

As an alternative I could maybe add a unique prefix to the vars, such as _TmyVar, but I've been using this-> for a long time so I just wondered.

解决方案

There is no overhead. The compiler will generate the exact same code for both versions.

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