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720360b07a
For actors which don't have needs_allocation set to TRUE and where the new allocation wouldn't be different from the old one, the allocate() vfunc doesn't have to be called. We still did this in case a parent actor was moved though (so the absolute origin changed), because we needed to propagate the ABSOLUTE_ORIGIN_CHANGED allocation flag down to all actors. Since that flag is now removed and got replaced with a private property, we can simply notify the children about the absolute allocation change using the existing infrastructure and safely stop allocating children at this point. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247