1hr+ for a general update* (following the guide. Pre-kernel)
On a more serious note, gentoo is fun… On competent hardware. This is a 4 core Celeron N2940 with 4gb of RAM.
*emerge --ask --verbose --update --deep --changed-use @world is too long to type…
All I have emerged was vim (because nano hurts my muscle memory) and fastfetch (because style points). That took 20 minutes+, but I just hoped its because i didnt select closer mirrors then.
Oh yeah. OpenRC, Desktop profile, multilib, so whatever packages included in there.
If i remember, use flags were : -kde, -gnome, -systemd, wifi… Not TOO crazy
If you’re doing an @world emerge, then you’ll be recompiling all installed packages with updates, including dependencies.
One of the heavier packages that’s included in almost every desktop profile as a dependency somewhere is
dev-qt/qtcore(full list of packages in the standard desktop profile here, though each package listed here will have its own dependencies which may have their own dependencies, etc. So it is not an exhaustive list), qtcore also appears to be what was compiling when the photo in your post was taken so is likely the primary cause of that specific long build time.