[Libreoffice-bugs] [Bug 98500] Multiple animated GIFs cause 100% CPU utilization in Impress

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=98500

--- Comment #17 from Dwokfur <atoth at atoth.sote.hu> ---
(In reply to QA Administrators from comment #16)
> ** Please read this message in its entirety before responding **
> MassPing-UntouchedBug

I'd like to confirm, that I still experience the symptoms on my behalf.
There are two issues mentioned in this bug. One issue is the behavior while
editing the slides. My problems show up in presentation mode.
The whole story escalated by the advent of version 5.x, version 4.x and before
is fine.
In editing mode you could see multiple animgifs playing at the same time
without any problems both while editing the slides or during presentation.
After version 5.x came out, either only the upper left animgif plays during
editing or none of them at all (this is just like Microsoft Office, where you
can only see animgifs playing in presentation mode).
If I start the presentation on Windows 7 Pro or Enterprise 64bit, Libreoffice
starts consuming CPU resources and hangs, but doesn't crash. Unexperienced
users may not be able to recover from this situation. You have to change tasks
and force Libreoffice to exit.
Version: 5.4.3.2 (x64)
Build ID: 92a7159f7e4af62137622921e809f8546db437e5
CPU threads: 8; OS: Windows 6.1; UI render: GL;
Locale: hu-HU (hu_HU); Calc: group
This keeps me using Libreoffice on Windows for the past two years or so. I use
Openoffice, which is still using version 4.x type rendering for animgifs.

I also use Libreoffice on Linux, where I compile it from source on Gentoo. That
instance of the software behaves better in presentation mode. Things got better
on Linux over the past two years. It tend to hang like on Windows before, but
now it plays the slides well enough. Linux version use different redering
backend definitely.
Version: 5.4.3.2
Build ID: Gentoo official package
CPU threads: 8; OS: Linux 4.14; UI render: default; VCL: gtk3;
Locale: hu-HU (hu_HU.utf8); Calc: group

I've uploaded a sample slide previously anyone can use to make a headache to a
machine running Libreoffice, especially on Windows. Please let me know if I can
help with anything else.
As version 6 is coming out, I will retest the situation.
I can easily hack on windows, since I'm using a rolling distro but not on
windows. Which is kind of unfortunate, since the symptoms are primarly
affecting Windows version of Libreoffice. I would be so happy to see this
problem go away.

Thanks:
Dwokfur

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