portage-ng / portage / app-containers / docker-registry / 3.0.0_rc2
emerge -vp

These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 1/20).

[ebuild  N     ] dev-lang/go-bootstrap-1.24.6::gentoo  USE="(-big-endian)" 71370 KiB
[ebuild  N     ] acct-group/registry-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-lang/go-1.27.2:0/1.27.2::gentoo  CPU_FLAGS_X86="sse2" 34312 KiB
[ebuild  N     ] acct-user/registry-0-r2::gentoo  0 KiB
[ebuild  N     ] app-containers/docker-registry-3.0.0_rc2::gentoo  13651 KiB

Total: 5 packages (5 new), Size of downloads: 119332 KiB

Wall time
2.003 s vs. 0.017 s for portage-ng