https://bugzilla.gnome.org/show_bug.cgi?id=778926 might be related
** Bug watch added: GNOME Bug Tracker #778926
https://bugzilla.gnome.org/show_bug.cgi?id=778926
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** Tags added: performance
** Also affects: gtk+3.0 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
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This is a known issue for software-rendered windows that update rapidly.
There are several reasons for it so also several possible solutions...
* GTK 3.x is software-rendered, so rapid window redraws that require
uploading new frames to the GPU from the CPU may be slow. This is mostly
fixable by c
