在. net中，列表被表示为数组。因此，与LinkedList相比，使用普通List会更快。这就是为什么上面的人看到他们看到的结果。

Why should you use the List? I would say it depends. List creates 4 elements if you don't have any specified. The moment you exceed this limit, it copies stuff to a new array, leaving the old one in the hands of the garbage collector. It then doubles the size. In this case, it creates a new array with 8 elements. Imagine having a list with 1 million elements, and you add 1 more. It will essentially create a whole new array with double the size you need. The new array would be with 2Mil capacity however, you only needed 1Mil and 1. Essentially leaving stuff behind in GEN2 for the garbage collector and so on. So it can actually end up being a huge bottleneck. You should be careful about that.

链表相对于数组的主要优点是，链接为我们提供了有效地重新排列项的能力。 塞奇威克，第91页

使用LinkedList的常见情况是这样的:

假设您想要从一个字符串列表中删除许多特定的字符串，这些字符串的大小很大，比如100,000。要删除的字符串可以在HashSet dic中查找，字符串列表中应该包含30,000到60,000个这样的需要删除的字符串。

那么用于存储100,000个字符串的列表的最佳类型是什么?答案是LinkedList。如果它们存储在数组列表中，则遍历它并删除匹配的字符串将占用 到数十亿次操作，而使用迭代器和remove()方法只需要大约100,000次操作。

LinkedList<String> strings = readStrings();
HashSet<String> dic = readDic();
Iterator<String> iterator = strings.iterator();
while (iterator.hasNext()){
    String string = iterator.next();
    if (dic.contains(string))
    iterator.remove();
}

在. net中，列表被表示为数组。因此，与LinkedList相比，使用普通List会更快。这就是为什么上面的人看到他们看到的结果。

Why should you use the List? I would say it depends. List creates 4 elements if you don't have any specified. The moment you exceed this limit, it copies stuff to a new array, leaving the old one in the hands of the garbage collector. It then doubles the size. In this case, it creates a new array with 8 elements. Imagine having a list with 1 million elements, and you add 1 more. It will essentially create a whole new array with double the size you need. The new array would be with 2Mil capacity however, you only needed 1Mil and 1. Essentially leaving stuff behind in GEN2 for the garbage collector and so on. So it can actually end up being a huge bottleneck. You should be careful about that.

使用LinkedList<>时

你不知道有多少东西会通过防洪闸门。例如，令牌流。 当你只想在结尾删除\插入。

对于其他内容，最好使用List<>。

我问了一个类似的关于LinkedList集合性能的问题，发现Steven Cleary的Deque c#实现是一个解决方案。与Queue集合不同，Deque允许前后移动项目。它类似于链表，但性能有所改进。