add set ip filter fb_ips { type ipv4_addr ; auto-merge; flags interval; }
time nft get element ip filter fb_ips { 52.216.24.236 } >/dev/null
real 0m 0.15s
user 0m 0.10s
sys 0m 0.05s
This is the typical timing to check for a facebook-ip in a set. Measurement done on a MT7620-based device. This looks quite slow to me. Any comments or timing examples from a more capable device ?