[Libreoffice-bugs] [Bug 114617] New: Performance on scrolling with inserted images is very bad

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=114617

            Bug ID: 114617
           Summary: Performance on scrolling with inserted images is very
                    bad
           Product: LibreOffice
           Version: 5.4.3.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: sworddragon2 at aol.com

Description:
I have created a new document which contains a few images (PNG's with a size of
usually a few hundred KIB's) where every image is covering ~95+% of a site. But
as soon as I'm scrolling through the document and hitting an image the
performance gets very bad:

- The scrolling process is stuttering.
- LibreOffice needs up to a few seconds to finish the process once the user
stops.
- The scrollbar is not able to visually update until the scrolling process
completely finishes.
- The CPU usage is very high (~250+%/600% (6 core CPU)) compared to scrolling
the same image in other applications (like Eye of GNOME where it is only
~5%/600%).

Actual Results:  


Expected Results:



Reproducible: Always


User Profile Reset: No



Additional Info:


User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:52.0) Gecko/20100101
Firefox/52.0

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