Regarding the problem of reading XML files with large amounts of data

For XML files with a large amount of data, when using xmlDocument to read, although XPath is supported and the query is more convenient, it needs to be loaded first, which wastes memory and is slower to use.

If you use XMLReader, there is no need for caching and the reading speed is very fast, but it is not so convenient if you want to query. XPath is not supported and you can only forward loop through the Reader() method. In order to avoid the shortcomings of the above two methods, we came up with the following plan:

1. First use XMLReader to read the contents of the XML file into a linked list.

2. When querying, just query the linked list (you can define the query function in the class that defines the linked list, and just call the function directly when querying, which is very convenient).

The results prove that: the speed and query effect are both very good.

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