portage-ng / portage / app-admin / conserver / 8.2.6-r3
emerge -vp

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

Calculating dependencies ... done!
Dependency resolution took 1.05 s (backtrack: 0/20).

[ebuild  N     ] app-admin/conserver-8.2.6-r3::gentoo  USE="ipv6 pam ssl -freeipmi -kerberos -tcpd -test" 428 KiB

Total: 1 package (1 new), Size of downloads: 428 KiB

Wall time
2.047 s vs. 0.014 s for portage-ng