[Libreoffice-bugs] [Bug 132955] New: PPTX: Moving to a slide takes a minute at 100% CPU after showing that slide

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=132955

            Bug ID: 132955
           Summary: PPTX: Moving to a slide takes a minute at 100% CPU
                    after showing that slide
           Product: LibreOffice
           Version: 7.0.0.0.alpha0+
          Hardware: All
               URL: https://bugzilla.suse.com/show_bug.cgi?id=1171015
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: gerald at pfeifer.com

Created attachment 160669
  --> https://bugs.documentfoundation.org/attachment.cgi?id=160669&action=edit
Bug document

Moving to slide 9 makes LibreOffice run busy for ~60 seconds while
consuming 100% CPU after showing the slide.

It is *not* the transition to the next slide that causes that, it is
"arriving" at slide 9 even though it's rendered already.

How to reproduce:

 1. Open deck
 2. Go to presentation mode
 3. Proceed slide by slide with <space> or <right-arrow>
 4. Notice how this stops between slides 9 and 10 
    (and again 

Tested with Version: 7.0.0.0.alpha1+
Build ID: 6ba74150866d71469827de9f4f19268dfa7db137
CPU threads: 4; OS: Linux 5.6; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI: en-US
TinderBox: Linux-rpm_deb-x86_64 at 86-TDF, Branch:master, Time:
2020-05-07_15:09:13
Calc: threaded


Originally reported against openSUSE at
https://bugzilla.suse.com/show_bug.cgi?id=1171015at

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