Themes and system peformance.

[Moltke]

Historically a lot of themes are designed for or are dependent on specific DEs. This is OK, but different DEs evolve differently. Mate and Cinnamon for example still have a lot of GTK2 dependencies. Other DEs like gnome are GTK3 dependent. Some application developers while not specifying a certain DE may spec GTK3 or GTK2 or QT 4 or 5 dependencies.

Thanks for that answer. I do understand the above, I think. When I visist xfce look I notice there are separated, independent gtk2 and gtk3 sub-categories.

Run a non-native application from the terminal some time without /dev/nulling the warnings and read them. DE theming itself

I have and noticed more often than not a warning messasge which reads something like

Code:

GTK Warning: function deprecated

can't remember the whole thing right now but never really paid much attention since it doesn't seem to affect app's functioning or performance.

If I understand correctly what you're saying, then, outdated/unmaintained themes may or may not have any influence in system's performance? i.e slow down the system and make it a pain to use it. But we cant expect annoyning behaviour like GUIs acting weird, not properly without impacting system performance?