bug#19776: 25.0.50; HTML rendering is very slow

[Lars Ingebrigtsen]

Richard Stallman <rms@gnu.org> writes:

> How much slower would it get if it counts the number of lines to be
> indented, first thing, and decides based on that whether to give
> progress messages?

The issue isn't the number of lines, and it has nothing to do with
indentation -- it's about the complexity of the layout and how easy it
is to make it fit into the buffer.  So making a guess at whether a given
HTML document will take a long or short time to render isn't trivial.

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