Bug 141278 - Scrolling a table big table with plenty of cells slow in single view (if visible in full) or in multi-page mode with pages next to each other
Summary: Scrolling a table big table with plenty of cells slow in single view (if visi...
Status: RESOLVED WORKSFORME
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
7.2.0.0.alpha0+
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: Scrolling-PageUpDown
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Reported: 2021-03-27 07:27 UTC by Telesto
Modified: 2021-04-07 17:53 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:

Attachments
Example file (46.75 KB, application/vnd.oasis.opendocument.text)
2021-03-27 07:27 UTC, Telesto 		Details
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Description Telesto 2021-03-27 07:27:11 UTC 
Description:
Scrolling a table big table with plenty of cells slow in single view (if visible in full) or in multi-page mode with pages next to each other

Steps to Reproduce:
1. Open the attached file
2. Multipage mode, pick zoom mode where you have 2 pages in a row
3. Scroll, up down (notice the delay of scrollbar) or even better simply drag the scrollbar up down with mouse 

Actual Results:
Not as snappy as it ideally should be

Expected Results:
lags and delays


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 7.2.0.0.alpha0+ (x64) / LibreOffice Community
Build ID: dc3b64dcbfb0a49c0be65bd8d73ed4e6d3828a21
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: default; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL
Comment 1 Telesto 2021-03-27 07:27:45 UTC 
Created attachment 170779 [details]
Example file
Comment 2 Roman Kuznetsov 2021-03-30 11:21:30 UTC 
There is a some delay in

Version: 7.2.0.0.alpha0+ (x64) / LibreOffice Community
Build ID: 78c33a4c3d1633b97049874305b3b49b820395a2
CPU threads: 4; OS: Windows 10.0 Build 18363; UI render: default; VCL: win
Locale: ru-RU (ru_RU); UI: en-US
Calc: threaded

and even worse with Skia =(

Version: 7.2.0.0.alpha0+ (x64) / LibreOffice Community
Build ID: 78c33a4c3d1633b97049874305b3b49b820395a2
CPU threads: 4; OS: Windows 10.0 Build 18363; UI render: Skia/Raster; VCL: win
Locale: ru-RU (ru_RU); UI: en-US
Calc: threaded
Comment 3 Luboš Luňák 2021-04-07 17:53:15 UTC 
With current master, which has some changes that might be relevant, I cannot see a noticeable difference with Skia compared to non-Skia => not Skia-specific.
And regardless of the backend I find the performance adequate, given that the table has 20000 cells, so unless the document is next to unusable, this is as good as it gets.