Improve performance in packet dissection #8448

Job	Run time
Check the validity of the commits	7s
Check SPDX identifiers	5s
Type hints check	29s
pyca/cryptography test	34s
Build doc	4m 55s
Code health check	1m 12s
CodeQL analysis	1m 6s
ubuntu-latest 3.9 non_root -K scanner	5m 19s
ubuntu-latest 3.10 non_root -K scanner	4m 51s
windows-latest 3.14 root -K scanner	6m 36s
ubuntu-latest libpcap 3.14 root -K scanner	5m 26s
ubuntu-22.04 3.7 non_root -K scanner	4m 57s
ubuntu-latest 3.8 non_root -K scanner	5m 7s
ubuntu-latest 3.13 non_root -K scanner	5m 30s
ubuntu-latest 3.14 root -k scanner	3m 27s
ubuntu-latest 3.14 root -K scanner	5m 41s
macos-14 3.14 both -K scanner	4m 11s
ubuntu-latest pypy3.11 root -K scanner	2m 34s
ubuntu-latest pypy3.11 root -k scanner	3m 22s
ubuntu-latest 3.11 non_root -K scanner	4m 51s
macos-14 3.14 both -k scanner	1m 27s
windows-latest 3.14 both -k scanner	3m 34s
	1h 15m 21s

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