[Libreoffice-bugs] [Bug 139068] Extremely slow scrolling in Writer when images are enabled in a document (KDE, GTK3, GDI worse, SKIA better)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=139068

--- Comment #23 from Todd Lewis <utoddl at gmail.com> ---
(In reply to Jean-François Fortin Tam from comment #22)
> Todd & Joshas, what you're seeing is probably the 7.0 regression described
> in bug #138068. That bug being fixed in 7.2 does not solve the issue I have
> reported above, which predates it. 
> 
> My bug report here is about the test case of heavy/high-resolution images;
> [...]

You are correct.

Although the attached sample document talks about slowed scrolling, the problem
to me at least is much more strikingly demonstrated by trying to simply add
garbage text. With "View -> Images and Charts" uncheck, it's instantaneous.
With "View -> Images and Charts" checked, it can take as long as 10 seconds
before the first typed characters start to appear in the document. (And
scrolling is slow, as you said.)

Just confirmed this with the attached sample document and both
Version: 7.0.4.2
Build ID: 00(Build:2)
CPU threads: 12; OS: Linux 5.10; UI render: default; VCL: gtk3
Locale: en-US (en_US.utf8); UI: en-US
Calc: threaded

and

Version: 7.2.0.0.alpha0+ / LibreOffice Community
Build ID: 41cffc379259fec626a282ca243a9750d96d1c63
CPU threads: 12; OS: Linux 5.10; UI render: default; VCL: gtk3
Locale: en-US (en_US.utf8); UI: en-US
TinderBox: Linux-rpm_deb-x86_64 at 86-TDF, Branch:master, Time:
2021-02-15_20:07:52
Calc: threaded

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