Created attachment 223801 [details] access_log.txt and exclude_ips.txt files With 13.0-RC4 I notice that I get very slow speed using grep with the follow parameters. With 12.2-RELEASE-p4 it is fast. Files used for the test are included in the attachment. ------------- FreeBSD 13.0-RC4: /usr/bin/time -l cat access_log.txt | grep -F -v -f exclude_ips.txt > output.log 358.92 real 0.00 user 0.00 sys 2200 maximum resident set size 8 average shared memory size 4 average unshared data size 128 average unshared stack size 148 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 1104 messages sent 0 messages received 0 signals received 138 voluntary context switches 0 involuntary context switches ------------- FreeBSD 12.2-RELEASE-p4: /usr/bin/time -l cat access_log.txt | grep -F -v -f exclude_ips.txt > output.log 0.18 real 0.00 user 0.00 sys 0 maximum resident set size 0 average shared memory size 0 average unshared data size 0 average unshared stack size 137 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 0 messages sent 0 messages received 0 signals received 70 voluntary context switches 0 involuntary context switches