Haskell解析内存不足的大xml文件

So, I've played around with several Haskell XML libraries, including hexpat and xml-enumerator. After reading the IO chapter in Real World Haskell (https://book.realworldhaskell.org/read/io.html) I was under the impression that if I run the following code, it will be garbage collected as I go through it. So, I've played around with several Haskell XML