Comment 8 for bug 1811900

ok - I've run a git bisect on https://salsa.debian.org/gnome-team/mutter/commits/upstream/3.28.x

dad@dad-VirtualBox:~/Downloads/mutter/mutter$ git bisect good
527f6ef8357f614793035a999ec4409ef02470e2 is the first bad commit
commit 527f6ef8357f614793035a999ec4409ef02470e2
Author: Carlos Garnacho <email address hidden>
Date: Sat Apr 29 11:43:33 2017 +0000

    ClutterActor: Preserve valid paint volumes till the next relayout/repaint

    Cuts down approximately all paint volume calculations when there's
    windows that redraw frequently, but don't move.

    https://bugzilla.gnome.org/show_bug.cgi?id=782344

    (cherry picked from commit 161d2540e659fa8ed5efc74f350a741b2430417d)

:040000 040000 058f850980bad70fdd5792a46dbfc33c70fe88c6 bf54863f282d901b9aeb323d00f2a5dfe2d13588 M clutter

I don't pretend to actually understand what that means or how to interpret a possible fix for budgie animations - but at least its something to focus on.