gnome-calendar UI is redrawn too much unnecessarily
Created attachment 329428 GNOME calendar with Graphic updates enabled
The main UI of gnome-calendar is redrawn unnecessarily. Even when the mouse movement happens on some other window, the gnome-calendar UI is updated for no reason.
For this reason, gnome-calendar really much CPU than it should.
The attached screencast is recorded using gtk inspector with Graphic updates shown.
Attachment 329428, "GNOME calendar with Graphic updates enabled":