类VS REF结构体 [英] Class VS ref Struct

问题描述

我编程使用C＃游戏，因此，我非常关心性能。

I am programming a game using C#, thus, I am very concerned about performance.

我想知道什么是主要区别，如果可能的话，使用一个类来传递数据左右，或者通过引用传递一个结构性能的考虑。

I would like to know what are the main differences, and if possible, performance considerations of using either a Class to pass data around, or a struct passed by reference.

我希望不要将数据身边复制，性能方面的原因（我假设由裁判传球比这里值更快）。

I wish not to copy the data around, for performance reasons (I assume passing by ref is much faster than by value here).

我知道，一类总是由参考和一个结构是按值传递过去了，但我谈论参照路过这里的结构。

我要传递的数据的一个例子：

An example of the data I wish to pass :

    public delegate void PathCompleteDelegate(List<PathFinderNode> path);
public struct PathFinderJob{
    public PathCompleteDelegate callback;
    public Vector3 start, end;
    public PathSize unitSize;
    public BoxCollider boxCollider;
}

在前面的例子中，采用了类有所作为会？如果是这样，将区别是什么？将一个类会比在这个例子中一个结构快？为什么呢？

In the previous example, would using a class make a difference? If so, what would the difference be? Would a class be faster than a struct in this example? Why?

感谢您。
若昂·卡洛斯

Thank you. Joao Carlos

推荐答案

您委托收到引用类型 - 一个列表，所以你通过引用传递反正整个列表。

Your delegate receives a reference type - a List, so you're passing the entire list by reference anyway.

按值传递一个大的结构肯定比仅仅通过参考最昂贵的。当你有一个大的结构，它通常没有意义的，使用它作为一个结构，只是把它变成一个类。

Passing a large structure by value is definitely most expensive than passing just the reference. When you have a large structure, it usually doesn't make sense to use it as a structure, just turn it into a class.

不管怎样，你的确保的你会在这里有一个性能问题？似乎是一个非常不成熟的优化。

Anyway, are you sure you'll have a performance issue here? Seems like a very premature optimization.

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