Ok.
Thanks for the answer.
Yes, I have a very large lists IPv4 in pfBlockerNG ( > 300.000 items ), I will see how to optimizer the lists.
Regards.
–-- add ---
Ok, if I uncheck:
"CIDR Aggregation - Optimise CIDRs (not recommended for slow systems with large lists) "
in menú Firewall > pfBlockerNG > pfBlockerNG , all is fine :)