Importing gopacket and doing nothing uses 8.2MB of RES mem

Subject says it all. Is this by design? Makes the use of gopacket difficult in resource constrained systems.

To reproduce:

import these packages

"github.com/google/gopacket"
_ "github.com/google/gopacket/afpacket"
_ "github.com/google/gopacket/layers"
_ "github.com/google/gopacket/pcap"

Just sleep in main. Then run htop and check RES memory.

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