Roughly twice as slow to load a PDF when network connectivity is available
This is a weird one.
I'm seeing large PDFs take roughly twice as long to load on X11 when network connectivity is available on the system.
One freely-available large PDF that easily manifests this issue (to me) is the single-volume Intel 64/IA-32 manual (source).
Running evince 43.1 on Arch with x86_64 Linux 6.2.11.
Also: xorg-server 21.1.8-1 and gnome-desktop 1:43.2-1 (both are Arch package versions).