Filter Rule	Processing Time
no filter	469.231535129662 us
“icmp”	524.893505343705 us
“icmp and host 127.0.0.1”	367.231761850006 us
“icmp and host 127.0.0.1 and ‘ip6 = 64’”	598.401917125821 us
“icmp and host 127.0.0.1 and ‘ip6 = 64’ and ‘ip[2:2] > 1’”	649.767235335359 us

Processing delay sampling (needs smoothing, of course):

The generated OPCODES:

icmp

(000) ldh      [12]
(001) jeq      #0x800           jt 2    jf 5
(002) ldb      [23]
(003) jeq      #0x1             jt 4    jf 5
(004) ret      #65535
(005) ret      #0

icmp and host 127.0.0.1

(000) ldh      [12]
(001) jeq      #0x800           jt 2    jf 9
(002) ldb      [23]
(003) jeq      #0x1             jt 4    jf 9
(004) ld       [26]
(005) jeq      #0x7f000001      jt 8    jf 6
(006) ld       [30]
(007) jeq      #0x7f000001      jt 8    jf 9
(008) ret      #65535
(009) ret      #0

icmp and host 127.0.0.1 and ‘ip⁶ = 64’

(000) ldh      [12]
(001) jeq      #0x800           jt 2    jf 11
(002) ldb      [23]
(003) jeq      #0x1             jt 4    jf 11
(004) ld       [26]
(005) jeq      #0x7f000001      jt 8    jf 6
(006) ld       [30]
(007) jeq      #0x7f000001      jt 8    jf 11
(008) ldb      [20]
(009) jeq      #0x40            jt 10    jf 11
(010) ret      #65535
(011) ret      #0

icmp and host 127.0.0.1 and ‘ip⁶ = 64’ and ‘ip[2:2] > 1’

(000) ldh      [12]
(001) jeq      #0x800           jt 2    jf 13
(002) ldb      [23]
(003) jeq      #0x1             jt 4    jf 13
(004) ld       [26]
(005) jeq      #0x7f000001      jt 8    jf 6
(006) ld       [30]
(007) jeq      #0x7f000001      jt 8    jf 13
(008) ldb      [20]
(009) jeq      #0x40            jt 10    jf 13
(010) ldh      [16]
(011) jgt      #0x1             jt 12    jf 13
(012) ret      #65535
(013) ret      #0