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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] acct-group/netperf-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-user/netperf-0-r2::gentoo  0 KiB
[ebuild  N     ] net-analyzer/netperf-2.7.0_p20210121::gentoo  USE="-demo -sctp" 1870 KiB

Total: 3 packages (3 new), Size of downloads: 1870 KiB