Bug 59010 - VIEWING: Scrolling performance slow in files with large/long column sections
Summary: VIEWING: Scrolling performance slow in files with large/long column sections
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
(earliest affected) release
Hardware: All All
: low minor
Assignee: Not Assigned
Whiteboard: BSA
Keywords: perf
Depends on:
Reported: 2013-01-04 05:18 UTC by Alexander
Modified: 2017-11-03 13:08 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:

file with problem (occurs on win7 with LibreOffice 3,6,4,3) (412.03 KB, application/vnd.oasis.opendocument.text)
2013-01-04 05:18 UTC, Alexander

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Description Alexander 2013-01-04 05:18:25 UTC
Created attachment 72494 [details]
file with problem (occurs on win7 with LibreOffice 3,6,4,3)

Problem description: 

Slow viewing and editing (2-3 fps) while working with big files (109k words, size 412 Kb). File was originally created in OoO Writer v.2.1, there were no slowdowns there. In Ubuntu 12.04 with LibreOffice of latest version there aren't any slowdowns either

Steps to reproduce:
1. Open file (attached)
2. Scroll or any other action causes slowdown (1-2 fps)

Current behavior:
Slow work while viewing and editing big file

Expected behavior:
Normal work while viewing and editing big file

Operating System: Windows 7
Version: release
Comment 1 Joel Madero 2013-11-21 01:29:46 UTC
I wouldn't be horribly surprised if this is a duplicate of one of our other performance issues but not positive so:

Thank you for reporting this issue! I have been able to confirm the issue on:
 Platform: Ubuntu Linux 13.04 x64
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + 
As I've been able to confirm this problem on an earlier release I am changing the version number as version is the earliest version that we can confirm the bug, we use comments to say that the bug exists in newer versions as well.

Marking as:

New (confirmed)
Minor - does not prevent high quality work
Low - default seems appropriate

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + 
LibreOffice is powered by a team of volunteers, every bug is confirmed (triaged) by human beings who mostly give their time for free. We invite you to join our triaging by checking out this link:

There are also other ways to get involved including with marketing, UX, documentation, and of course developing -  http://www.libreoffice.org/get-help/mailing-lists/. 

Lastly, good bug reports help tremendously in making the process go smoother, please always provide reproducible steps (even if it seems easy) and attach any and all relevant material
Comment 2 Owen Genat (retired) 2014-01-10 00:29:33 UTC
This particular bug appears to relate to column handling. I tested the provided (unchanged) file under Ubuntu 10.04 x86_64 running:

- v3.3.0.4 OOO330m19 Build: 6
- v3.4.6.2 OOO340m1 Build: 602
- v3.5.7.2 Build ID: 3215f89-f603614-ab984f2-7348103-1225a5b
- v3.6.7.2 Build ID: e183d5b
- v4.0.6.2 Build ID: 2e2573268451a50806fcd60ae2d9fe01dd0ce24
- v4.1.4.2 Build ID: 0a0440ccc0227ad9829de5f46be37cfb6edcf72

Versions through scrolled as expected without noticeable lag. Scrolling in was markedly slower. Scrolling in was slow, but not as bad as Scrolling in seemed slower again than 

I then removed the initial yellow/green tables (there are three) and this made no difference to the scrolling lag in Using the original file again (i.e., tables included) I edited the Default Style page style and changing it to a single column which returned scrolling to an expected level in,, and

Summary amended for clarity. Appears to be a performance regression.
Comment 3 senya 2014-01-31 11:35:08 UTC
I also was able to reproduce this problem on 
ubuntu 13.10 LO
win7 LO seem to be better that, but that was tested on different machines (although, the second machine seem to me more fast).

I can attach my document, if it is required.
Comment 4 David 2015-01-15 22:47:53 UTC
Tested attachment on 4.4.0 RC2. For me, it operated normally until I did a Tools - Update - Update All. Then it was an instant severe, slow down in scrolling speed.
Comment 5 Robinson Tryon (qubit) 2015-12-10 02:02:51 UTC Comment hidden (obsolete)
Comment 6 QA Administrators 2017-01-03 19:42:20 UTC Comment hidden (obsolete)
Comment 7 David 2017-10-06 15:27:51 UTC
Attached file seems to now operate normally under Linux with version 5.4.2, even after doing Tools - Update - Update All.