portage-ng / portage / sys-libs / zlib-ng / 2.2.5
pmerge --pretend --verbose
[ebuild  N     ] sys-libs/zlib-ng-2.2.5::gentoo USE="(-compat) -test" CPU_FLAGS_X86="avx2 avx512f pclmul sse2 sse4_2 ssse3 -avx512_vnni -vpclmulqdq" 2.3 MiB

Total: 1 package (1 new), Size of downloads: 2.3 MiB


 * Running sanity checks...

 * resolver plan required 4 ops (0.01 seconds)

Wall time
0.430 s vs. 0.012 s for portage-ng