scripts vs networkd

# network scripts

root@megrez ~# ps ax |grep -i '[d]hcp'
    634 ?        Ss     0:00 dhcpcd: end0 [ip4] [ip6]
    635 ?        S      0:00 dhcpcd: [privileged proxy] end0 [ip4] [ip6]
    636 ?        S      0:00 dhcpcd: [network proxy] end0 [ip4] [ip6]
    637 ?        S      0:00 dhcpcd: [control proxy] end0 [ip4] [ip6]
    709 ?        S      0:00 dhcpcd: [BPF ARP] end0 192.168.85.61
    710 ?        S      0:00 dhcpcd: [DHCP6 proxy] fe80::ba64:e561:ba10:6c76
    729 ?        S      0:00 dhcpcd: [BOOTP proxy] 192.168.85.61

root@megrez ~# ps -eo comm,rss --no-headers | awk '/dhcp/ {sum += $2} END {print sum}'
13912



# systemd

root@megrez ~# ps v $(pidof systemd-networkd)
    PID TTY      STAT   TIME  MAJFL   TRS   DRS   RSS %MEM COMMAND
    454 ?        Ss     0:00     11  1206 15993  9832  0.0 /usr/lib/systemd/systemd-networkd