[tex4ht] "page is empty" messages. But nothing seems wrong in the HTML

[Michal Hoftich]

> It took me about one week to compile 205 latex files. Some are
> few thousands of pages with lots of math. I have 16 GB RAM PC,
> intel i7-3930k CPU running windows 7. Using cygwin to build now.
>
> Lualatex finishes very fast. may be Few minutes. But tex4ht is
> the one that takes sooo long.
>

Do you run the build in parallel? TeX and tex4ht can run only on
single processor core, so this should speed up the compilation
significantly.

Michal