Bug 103076 - Heavy slowdown when scrolling across big pictures
Summary: Heavy slowdown when scrolling across big pictures
Status: RESOLVED DUPLICATE of bug 87485
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
(earliest affected) release
Hardware: All Linux (All)
: lowest minor
Assignee: Not Assigned
Depends on:
Reported: 2016-10-09 23:38 UTC by Frank Brütting
Modified: 2016-11-21 06:37 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:

Big picture (28.42 KB, image/png)
2016-10-10 10:31 UTC, Frank Brütting
Document with big picture (37.72 KB, application/vnd.oasis.opendocument.text)
2016-10-10 10:32 UTC, Frank Brütting

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Description Frank Brütting 2016-10-09 23:38:26 UTC
When I add a bigger picture to my document, scrolling across it slows writer down and causes stuttering. Takes a few seconds at the beginning (maybe the image gets loaded?), and then scrolling continues, but a little bit slower than standard. It was a PNG graphic in my case.

Steps to Reproduce:
1. Place a big picture in a document
2. Get it out of sight
3. Scroll back to the picture

Actual Results:  
Stuttering and slowdown

Expected Results:
Smooth scrolling

Reproducible: Always

User Profile Reset: No

Additional Info:

User-Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:49.0) Gecko/20100101 Firefox/49.0
Comment 1 Joel Madero 2016-10-09 23:56:26 UTC
Please attach a document.

I'm hesitant to mark this as NEW just because we are well aware that our image handling isn't fantastic. There are dozens of reports that are probably duplicates of this (or have a similar root problem).

To say the least, we need a document. Marking as NEEDINFO, once you attach, mark as UNCONFIRMED. Thanks

Minor: Can slow down but will not prevent high quality work;
Low: Default for bugs that do not prevent high quality work.
Comment 2 Frank Brütting 2016-10-10 10:31:10 UTC
Created attachment 127915 [details]
Big picture
Comment 3 Frank Brütting 2016-10-10 10:32:18 UTC
Created attachment 127916 [details]
Document with big picture
Comment 4 Frank Brütting 2016-10-10 10:36:27 UTC
Here is my example. Scrolling in this case doesn't stutter as heavy as in my real case - maybe it's due to the document not containing as much data, maybe it's due to the image, not containing a real schematic. But I can recognize the effect.
Comment 5 Joel Madero 2016-10-10 14:25:38 UTC
Build ID: 28d3a6af0703c666d80e38c9c4b86024d830994d
CPU Threads: 2; OS Version: Linux 3.16; UI Render: default; 
Locale: en-US (en_US.UTF-8); Calc: group

Confirmed. Like I said, almost definitely a duplicate of an already existing bug but I'll push to NEW.

If you can search through the current bug list and see if you can find a duplicate of this one that would be fantastic. Also please come say hi to the QA team at http://webchat.freenode.net/?channels=libreoffice-qa

We're always looking for new cool people to come and assist :)
Comment 6 MM 2016-10-10 19:20:54 UTC
Dup of bug 87485 ?
Comment 7 Joel Madero 2016-10-15 23:28:37 UTC
Looks like it to me.

*** This bug has been marked as a duplicate of bug 87485 ***