Draft: gobject: Mute toggle ref notifications for transient ref/unref pairs

Daniel van Vugtrequested to merge
vanvugt/glib:mute-toggles-during-notify into main

The ref/unref that occur in g_object_notify* are very short lived and have a net zero effect on the reference count of the object. So allowing them to trigger toggle notifications was incurring excessive garbage collection in GJS (gnome-shell).

Now we "mute" toggle notifications specifically for those brief references in g_object_notify* so that notifications like the ticking of GnomeWallClock don't indirectly lead to garbage collection runs.

Closes: gnome-shell#4800 (closed)
Closes: gnome-shell#2085

Edited by Daniel van Vugt

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