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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libmaxminddb-1.14.1:0/0.0.7::gentoo  USE="-test" 827 KiB
[ebuild  N     ] dev-libs/jansson-2.15.1:0/4::gentoo  USE="-doc -static-libs" 478 KiB
[ebuild  N     ] www-misc/logswan-2.1.15::gentoo  26 KiB

Total: 3 packages (3 new), Size of downloads: 1330 KiB