Stack Overflow reading huge old HTML

I had a performance problem displaying huge HTML , then I was looking for huge simple HTML in english.
I found [http://www.gutenberg.org/files/1661/1661-h/1661-h.htm](http://www.gutenberg.org/files/1661/1661-h/1661-h.htm) and I tried and got StackOverflow error.
I knew this HTML was so old therefore it might be cause error on parsing.

I suggest using [SGMLReader](https://github.com/MindTouch/SGMLReader) for parsing any HTML.
I'm using it for many scraping projects and results are so reasonable.