lots of network interfaces

[Wojciech Puchar]

>> very usable at that point, ifconfig aside).
>
> The interfaces are a linked list, plus there's a separate kernel dive
> for each interface.  The list (as opposed to individual interfaces) is

i don't care how fast ifconfig displays them, just for how fast things 
like routing or ipfw rule like "via tun196" would work.

if it is hashed somehow - fine.
if not - very bad.