Bug 155256 - Lots CPU time used when scrolling a spreadsheet with lots of cells with multi-line contents with page up/down with Skia/Raster. Terrible slow with GDI
Summary: Lots CPU time used when scrolling a spreadsheet with lots of cells with multi...
Status: RESOLVED DUPLICATE of bug 155286
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Calc (show other bugs)
Version:
(earliest affected)
7.6.0.0 alpha0+
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-05-11 19:57 UTC by Telesto
Modified: 2023-05-18 15:12 UTC (History)
2 users (show)

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Description Telesto 2023-05-11 19:57:02 UTC 
Description:
Lots CPU time used when scrolling a spreadsheet with lots of cells with multi-line contents with page up/down with Skia/Raster. Terrible slow with GDI

Steps to Reproduce:
1. Open attachment 151324 [details]  (bug 125236)
2. Open an activity monitor (like process explorer) 
3. Press and hold Scroll page up

Actual Results:
Utilizing a core to max. With profiling it starts to lag. With GDI it lags in any case

Expected Results:
I assume there is some room for optimization (or related to scrolling fast causing a crash with Skia Vulkan)


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: c4a58634753a84b09f20f7271d6525a6656522d3
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: default; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL threaded
Comment 1 m_a_riosv 2023-05-11 21:20:27 UTC 
I can't repro
Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: daf30c29be67b8b8fa361b0efd1a6cdbe087b6f8
CPU threads: 16; OS: Windows 10.0 Build 22621; UI render: Skia/Raster; VCL: win
Locale: es-ES (es_ES); UI: en-US Calc: CL threaded
neither
Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: daf30c29be67b8b8fa361b0efd1a6cdbe087b6f8
CPU threads: 16; OS: Windows 10.0 Build 22621; UI render: default; VCL: win
Locale: es-ES (es_ES); UI: en-US Calc: CL threaded
Comment 2 Buovjaga 2023-05-17 13:18:36 UTC 
(In reply to Telesto from comment #0)
> Additional Info:
> Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community
> Build ID: c4a58634753a84b09f20f7271d6525a6656522d3
> CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: default; VCL: win
> Locale: nl-NL (nl_NL); UI: en-US
> Calc: CL threaded

I see your build is 1 and a half months old. Maybe try with a fresh one to be sure.
Comment 3 Telesto 2023-05-18 15:12:27 UTC 

*** This bug has been marked as a duplicate of bug 155286 ***