https://bugs.documentfoundation.org/show_bug.cgi?id=156169

            Bug ID: 156169
           Summary: Trackpad scroll choppy on displaying formulas
           Product: LibreOffice
           Version: 7.1.0.0.alpha0+
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Keywords: bibisected, bisected, regression
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs@lists.freedesktop.org
          Reporter: stephane.guil...@libreoffice.org
                CC: arato.dan...@nisz.hu, banhegyi.attilai...@nisz.hu
            Blocks: 108075, 135859

Steps:
1. Open attachment 188162
1. Using trackpad scroll, scroll down 1 page and back to the top of the
document, fast. Repeat many times.
I see the canvas having hiccups on the top section's formulas since 7.1, but
not in 7.0.

Bibisected with linux-64-7.1 repository to first bad commit
c391d02248a86bfc4a57448859eaf70403a365a7 which points to core commit:

commit d336e6c26012255015d3fc0caf8e7fafe14bd8f2
author  Daniel Arato (NISZ) <arato.dan...@nisz.hu>      Mon Aug 24 11:05:17
2020 +0200
committer       László Németh <nem...@numbertext.org>   Fri Aug 28 13:13:58
2020 +0200
tdf#69647 sw layout: fix line spacing with inline pictures
Line height is now based on (the biggest) font size in the
line rather than on the size of the tallest object there,
according to ODF and like MSO does.
Note: handling of first paragraph line is still different.
Co-authored-by: Attila Bánhegyi (NISZ)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/101272

Daniel and Attila, can you please have a look?


Referenced Bugs:

https://bugs.documentfoundation.org/show_bug.cgi?id=108075
[Bug 108075] [META] Scrolling and Page up/down issues
https://bugs.documentfoundation.org/show_bug.cgi?id=135859
[Bug 135859] [META] Formula-related issues
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