Bug 134701 - Zooming in/out in single page view slowish
Summary: Zooming in/out in single page view slowish
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
(earliest affected)
Inherited From OOo
Hardware: All All
: medium minor
Assignee: Not Assigned
Keywords: perf
Depends on:
Blocks: Zoom
  Show dependency treegraph
Reported: 2020-07-09 21:12 UTC by Telesto
Modified: 2022-12-01 03:47 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:

Example file (575.87 KB, application/vnd.oasis.opendocument.text)
2020-07-09 21:12 UTC, Telesto
BT with symbols VTune Profiler based on x39 build (2.58 KB, text/plain)
2020-07-09 21:14 UTC, Telesto

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Description Telesto 2020-07-09 21:12:32 UTC
Zooming in/out slowish

Steps to Reproduce:
1. Open the attached file
2. CTRL+SCROLL WHEEL DOWN and up again

Actual Results:
Slow zooming in

Expected Results:
Bit faster

Reproducible: Always

User Profile Reset: No

Additional Info:
Found in
Version: (x64)
Build ID: c48e4d795e37f23b71d647247590807ab9e52223
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL

and in 

and in

and in 

and in

and in

and in
LibreOffice 3.3.0 
OOO330m19 (Build:6)
tag libreoffice-
Comment 1 Telesto 2020-07-09 21:12:47 UTC
Created attachment 162864 [details]
Example file
Comment 2 Telesto 2020-07-09 21:14:05 UTC
Created attachment 162865 [details]
BT with symbols VTune Profiler based on x39 build
Comment 3 Telesto 2020-07-09 21:14:37 UTC
7.1 and 6.0 are certainly somewhat slower compared to
Comment 4 Telesto 2020-07-10 07:54:54 UTC
Not Skia related.. and of course feel free to ignore

However rendering contact objects (not sure of proper naming) is quite slow while zooming in/out with scroll wheel. I assume a scroll wheel 'tick' (next zoomlevel) triggering rendering.. invalidated by the next scroll wheel tick (next zoom level). The speed depends on content and the size of document I assume
Comment 5 Buovjaga 2020-11-30 14:50:00 UTC

Version: (x64)
Build ID: f7e2f5bca938aa916830e07895d2da6820282055
CPU threads: 2; OS: Windows 10.0 Build 19042; UI render: default; VCL: win
Locale: fi-FI (fi_FI); UI: en-US
Calc: threaded
Comment 6 QA Administrators 2022-12-01 03:47:02 UTC
Dear Telesto,

To make sure we're focusing on the bugs that affect our users today, LibreOffice QA is asking bug reporters and confirmers to retest open, confirmed bugs which have not been touched for over a year.

There have been thousands of bug fixes and commits since anyone checked on this bug report. During that time, it's possible that the bug has been fixed, or the details of the problem have changed. We'd really appreciate your help in getting confirmation that the bug is still present.

If you have time, please do the following:

Test to see if the bug is still present with the latest version of LibreOffice from https://www.libreoffice.org/download/

If the bug is present, please leave a comment that includes the information from Help - About LibreOffice.
If the bug is NOT present, please set the bug's Status field to RESOLVED-WORKSFORME and leave a comment that includes the information from Help - About LibreOffice.

Please DO NOT

Update the version field
Reply via email (please reply directly on the bug tracker)
Set the bug's Status field to RESOLVED - FIXED (this status has a particular meaning that is not 
appropriate in this case)

If you want to do more to help you can test to see if your issue is a REGRESSION. To do so:
1. Download and install oldest version of LibreOffice (usually 3.3 unless your bug pertains to a feature added after 3.3) from https://downloadarchive.documentfoundation.org/libreoffice/old/

2. Test your bug
3. Leave a comment with your results.
4a. If the bug was present with 3.3 - set version to 'inherited from OOo';
4b. If the bug was not present in 3.3 - add 'regression' to keyword

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Warm Regards,
QA Team