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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/simdjson-5.0.5:0/34::gentoo  USE="all-impls -nan -test -tools" 15150 KiB

Total: 1 package (1 new), Size of downloads: 15150 KiB