portage-ng / portage / dev-perl / Net-XMPP / 1.50.0-r1
emerge -vp

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

Calculating dependencies ... done!
Dependency resolution took 1.08 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Digest-BubbleBabble-0.20.0-r3::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 45 KiB
[ebuild  N     ] dev-perl/Net-LibIDN2-1.20.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 24 KiB
[ebuild  N     ] dev-perl/Net-DNS-1.560.0::gentoo  USE="-examples -minimal -test -verify-sig" PERL_FEATURES="ithreads (-debug) -quadmath" 260 KiB
[ebuild  N     ] dev-perl/Net-DNS-SEC-1.260.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 42 KiB
[ebuild  N     ] dev-perl/XML-Stream-1.240.0-r2::gentoo  USE="ssl -test" PERL_FEATURES="ithreads (-debug) -quadmath" 80 KiB
[ebuild  N     ] dev-perl/Net-XMPP-1.50.0-r1::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 102 KiB

Total: 6 packages (6 new), Size of downloads: 551 KiB

Wall time
2.049 s vs. 0.067 s for portage-ng