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claude suggests this bound checking optimization

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it is about 4.4% better on the bench-cpu-long cpu usage test
This commit is contained in:
Jay Wren
2025-10-23 13:27:37 -04:00
parent 273119638d
commit 0827a6f1c5
1 changed files with 5 additions and 4 deletions
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9
outside.go
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@@ -333,12 +333,13 @@ func parseV6(data []byte, incoming bool, fp *firewall.Packet) error {
} }
fp.Protocol = uint8(proto) fp.Protocol = uint8(proto)
ports := data[offset : offset+4]
if incoming { if incoming {
fp.RemotePort = binary.BigEndian.Uint16(data[offset : offset+2]) fp.RemotePort = binary.BigEndian.Uint16(ports[0:2])
fp.LocalPort = binary.BigEndian.Uint16(data[offset+2 : offset+4]) fp.LocalPort = binary.BigEndian.Uint16(ports[2:4])
} else { } else {
fp.LocalPort = binary.BigEndian.Uint16(data[offset : offset+2]) fp.LocalPort = binary.BigEndian.Uint16(ports[0:2])
fp.RemotePort = binary.BigEndian.Uint16(data[offset+2 : offset+4]) fp.RemotePort = binary.BigEndian.Uint16(ports[2:4])
} }
fp.Fragment = false fp.Fragment = false