[okular] [Bug 359932] Okular is very slow at opening some EPUB's

[Milan Hauth]

https://bugs.kde.org/show_bug.cgi?id=359932

--- Comment #27 from Milan Hauth <milahu at gmail.com> ---
> The core issue here is that QTextDocument is slow on large documents

ok, so this is an known upstream bug in qt6

https://doc.qt.io/qt-6/richtext-advanced-processing.html#handling-large-files

> For especially large files, however,
> you might experience that your application will become unresponsive
> or that you will run out of memory.

so the official workaround is to defer the problem to the user?
thats a joke. this bug should be fixed in qt

> We can't I think fix QTD

then okular should just use a working HTML rendering engine...

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