[Libreoffice-bugs] [Bug 119254] New: Copying a slide with multiple shapes (~1000) takes a long time

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=119254

            Bug ID: 119254
           Summary: Copying a slide with multiple shapes (~1000) takes a
                    long time
           Product: LibreOffice
           Version: 6.1.0.3 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: gorkang at gmail.com

Created attachment 144153
  --> https://bugs.documentfoundation.org/attachment.cgi?id=144153&action=edit
Presentation with a slide with 2000 shapes

When copy/pasting a slide with multiple shapes in Ubuntu, the UI freezes for a
long time.

I attach a file with an empty slide and a second slice that contains > 2000
shapes (1000 triangles and 1000 circles). If I copy/paste slide 2, the UI
freezes for a long time. For more complex documents, the time increases
considerably.

LO 6.0.6.2: 1m 52s
LO 6.1.0.3: 1m 18s

Also, if I dare to try to select and copy all the shapes in the slide, the
whole computer freezes and becomes unusable.

I believe that a similar document was handled significantly better in LO a few
years back (~2013).

If I do the same operation in a VM with Windows 7 and Microsoft Office 2013
(.odp, .ppt or .pptx), the copy/paste or selection is almost instantaneous.
Interestingly, when I save in LO the .odp file in .ppt/pptx, the 29MB file
becomes a 1MB file.

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