Public bug reported:

(Cross-posting from
https://bugs.documentfoundation.org/show_bug.cgi?id=129900 as problem
not reproducible on Windows.)

Compared to LibreOffice 5, exiting Print Preview in long documents on
LO6 is extremely slow.

With a 1,500 page document, for example, exiting Print Preview is
instant in LO5, but takes 5-6 seconds (!) in LO6.

To reproduce:

1. In LibreOffice 6 Writer, fill a document with text so that it
comprises at least a few hundred pages.

2. Enter Print Preview (e.g. File -> Print Preview).

3. Observe it takes a second or two (based on document length) to
display the Print Preview screen. This is similar to LibreOffice 5.

4. Press Escape to exit Print Preview mode.

5. Observe a significant delay (approx. 5-6 seconds for a 1,500 page
document) with CPU usage spiking before returning to normal view. There
is no such delay in LibreOffice 5.3.0.3 Writer.

I tend to flip back and forth between Normal View and Print Preview when
editing a document, and this new delay makes this very awkward.

Ubuntu 19.10

Version: 6.3.4.2
Build ID: 1:6.3.4-0ubuntu0.19.10.1
CPU threads: 4; OS: Linux 5.3; UI render: default; VCL: gtk3; 
Locale: en-AU (en_AU.UTF-8); UI-Language: en-US
Calc: threaded

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: libreoffice-writer 1:6.3.4-0ubuntu0.19.10.1
ProcVersionSignature: Ubuntu 5.3.0-26.28-generic 5.3.13
Uname: Linux 5.3.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Jan 10 10:53:20 2020
InstallationDate: Installed on 2013-04-11 (2464 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130402.1)
SourcePackage: libreoffice
UpgradeStatus: Upgraded to eoan on 2019-11-07 (63 days ago)
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=0
mtime.conffile..etc.default.apport: 2015-03-26T08:56:12.843910

** Affects: libreoffice (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug eoan third-party-packages

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to libreoffice in Ubuntu.
https://bugs.launchpad.net/bugs/1859098

Title:
  Exiting Writer's Print Preview mode is slow in long documents

Status in libreoffice package in Ubuntu:
  New

Bug description:
  (Cross-posting from
  https://bugs.documentfoundation.org/show_bug.cgi?id=129900 as problem
  not reproducible on Windows.)

  Compared to LibreOffice 5, exiting Print Preview in long documents on
  LO6 is extremely slow.

  With a 1,500 page document, for example, exiting Print Preview is
  instant in LO5, but takes 5-6 seconds (!) in LO6.

  To reproduce:

  1. In LibreOffice 6 Writer, fill a document with text so that it
  comprises at least a few hundred pages.

  2. Enter Print Preview (e.g. File -> Print Preview).

  3. Observe it takes a second or two (based on document length) to
  display the Print Preview screen. This is similar to LibreOffice 5.

  4. Press Escape to exit Print Preview mode.

  5. Observe a significant delay (approx. 5-6 seconds for a 1,500 page
  document) with CPU usage spiking before returning to normal view.
  There is no such delay in LibreOffice 5.3.0.3 Writer.

  I tend to flip back and forth between Normal View and Print Preview
  when editing a document, and this new delay makes this very awkward.

  Ubuntu 19.10

  Version: 6.3.4.2
  Build ID: 1:6.3.4-0ubuntu0.19.10.1
  CPU threads: 4; OS: Linux 5.3; UI render: default; VCL: gtk3; 
  Locale: en-AU (en_AU.UTF-8); UI-Language: en-US
  Calc: threaded

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: libreoffice-writer 1:6.3.4-0ubuntu0.19.10.1
  ProcVersionSignature: Ubuntu 5.3.0-26.28-generic 5.3.13
  Uname: Linux 5.3.0-26-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Jan 10 10:53:20 2020
  InstallationDate: Installed on 2013-04-11 (2464 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130402.1)
  SourcePackage: libreoffice
  UpgradeStatus: Upgraded to eoan on 2019-11-07 (63 days ago)
  modified.conffile..etc.default.apport:
   # set this to 0 to disable apport, or to 1 to enable it
   # you can temporarily override this with
   # sudo service apport start force_start=1
   enabled=0
  mtime.conffile..etc.default.apport: 2015-03-26T08:56:12.843910

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