https://bugs.kde.org/show_bug.cgi?id=387910
Buovjaga <todven...@suomi24.fi> changed:
What |Removed |Added
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CC| |todven...@suomi24.fi
--- Comment #4 from Buovjaga <todven...@suomi24.fi> ---
(In reply to b2.temp from comment #2)
> Nowadays, 2019, it seems that the problem only happens with highligthning
> toggled on.
Looks like there is ongoing work on this:
https://phabricator.kde.org/D17241
"WIP:Disable highlighting after 512 characters on a line."
(In reply to FeepingCreature from comment #3)
> There seems to only be one call to QTextLayout::draw causing the majority of
> the slowdown.
This old (still open) Qt issue seems to match the topic of the report:
https://bugreports.qt.io/browse/QTBUG-21699
"QTextDocumentLayout::draw() is slow if there is text selection"
Quote: "its seems that QTextLayout is still used for text rendering, making it
possible that this problem is present also on Qt5"
I actually don't repro the slowness with attachment 109380, but have constantly
ran into the issue of long lines causing Kate to basically hang. Unzip any ODF
document and open its content.xml to experience it. I always have to beautify
XML to work with it. Notepad++, for example, has never had these problems.
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