https://bugs.documentfoundation.org/show_bug.cgi?id=123181

Tex2002ans <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |Tex2002ans+LibreOffice@gmai
                   |                            |l.com

--- Comment #4 from Tex2002ans <[email protected]> ---
This is still the case in:

Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: Skia/Raster;
VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded

I got INCREDIBLY SLOW scrolling with these 2 settings ON:

- Tools > Options
- LibreOffice > View
--- ON = "Use Skia for all rendering"
--- ON = "Force Skia Software rendering"

But I DID NOT get super slow scrolling with:

- ON = "Use Skia for all rendering"
- OFF = "Force Skia Software rendering"

or:

- OFF = "Use Skia for all rendering"
- OFF = "Force Skia Software rendering"

So "Force Skia" ON is the difference for me.

- - -

STEPS TO REPRODUCE

0. In LibreOffice:

- Tools > Options
- LibreOffice Writer > View
- Make sure the "Smooth Scroll" checkbox is ON.

1. Back in the document:

- Press "Page Down" a few times.

BUG: See the page go downwards at an extremely slow crawl.

= ~7 seconds to finish 1 "Page Down".

NOTE: You could also "Page Up" or use the ARROW KEYS to navigate around too.

NOTE 2: This slowdown didn't even require the "complex ODT document" test in
Comment 0. I first stumbled across this in a very simple TXT document while
testing another issue.

- - -

I DID NOT get super slow scrolling with:

ABOUT #1 (my default):

- "Use Skia for all rendering" ON.
- "Force Skia Software rendering" OFF.

Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: Skia/Vulkan;
VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded

ABOUT #2:

- "Use Skia for all rendering" OFF.
- "Force Skia Software rendering" OFF.

Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: default; VCL:
win
Locale: en-US (en_US); UI: en-US
Calc: threaded

And here is my default/working "skia.log" info too if that somehow helps:

RenderMethod: vulkan
Vendor: 0x10de
Device: 0x2504
API: 1.4.312
Driver: 580.352.0
DeviceType: discrete
DeviceName: NVIDIA GeForce RTX 3060
Denylisted: no

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