https://bugs.documentfoundation.org/show_bug.cgi?id=103698

            Bug ID: 103698
           Summary: Slow Horizontal resize with Sidebar (Regression??)
           Product: LibreOffice
           Version: 5.2.3.2 rc
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: [email protected]
          Reporter: [email protected]

Description:
At some time in the past (when the Sidebar was first appearing), Writer spent
an enormous amount of time redrawing the screen over and over whenever the
window was resized horizontally. I was unable to locate the original bug
report, but I did mention noticing that the problem had been corrected when I
said the following while posting bug #99829:

****************BEGIN QUOTE:
Just got to use the newly downloaded LibreOffice:
  Version: 5.1.3.2
  Build ID: 1:5.1.3~rc2-0ubuntu1~trusty1
  CPU Threads: 4; OS Version: Linux 3.19; UI Render: default; 
  Locale: en-US (en_US.UTF-8)

First thing I noticed was that one can now grab the right screen edge to resize
the window without the SideBar stretching ever-so-slowly to catch up. Kudos for
the speed-up!
****************END OF QUOTE

With the most recent update (through the ppa
"http://ppa.launchpad.net/libreoffice/libreoffice-5-0/ubuntu xenial main") the
painfully slow horizontal stretching is now back. I now have:
Version: 5.2.3.2
Build ID: 1:5.2.3~rc2-0ubuntu1~xenial1
CPU Threads: 4; OS Version: Linux 4.4; UI Render: default; 
Locale: en-US (en_US.UTF-8); Calc: group

As I said earlier, my recollection is that the "slow stretching" originally had
to do with the Sidebar (at the time listed as "experimental"). Something has
regressed between 5.1.3.2 (when I reported it "fixed") and now (5.2.3.2); since
I've had the ppa active for a while, I suspect this very last update. I didn't
notice this regression immediately, since I have been avoiding LO when I don't
need it, but I'm pretty sure I used Writer often enough to have noticed it
before this update.

I believe this is NOT related to bug #99153 - even though I use 64 bit Ubuntu,
I never noticed that issue.

Bug #99702 also seems to report similar issue(s) but, again, it's different
enough that it's hard to say.

Bug #101213 seems to be related mostly to spreadsheets, but doesn't sound the
same to me either.


Steps to Reproduce:
1. With Sidebar displayed, resize the screen.
2. That's it.
3. Same problem existed earlier - got fixed in 5.1.3.2 - came back with 5.2.3.2

Actual Results:  
Resize seems to redraw the screen for every pixel, blinking until it gets to
where it needs to be.

Expected Results:
Just resized normally.


Reproducible: Always

User Profile Reset: No

Additional Info:


User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:49.0) Gecko/20100101
Firefox/49.0

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