> If XFCE really wants to be lighter than Gnome, [..] it should
> by default have the panel applets as in-process. The
> per-process memory overhead for a Gtk program is pretty large.
This is what is meant by internal and external plugins for the panel.
Internal plugins (considered stable and part of the Xfce core) runs in the same process as the panel.
External plugins runs in their own process, and cannot crash the panel if the plugin crashes. Creates overhead, correct, but increases the stability of the panel.
This is my understanding as someone following the dev-mailinglist but who is not a developer.
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