Re: [lisp-snmp] Misc fiddles for new OID types

[John F. <jf...@ms...>]

Dear Chun Tian,

"Chun Tian (binghe)" <bin...@gm...> writes:
[...]
> Using a "weak hash table" as a cache for holding SIMPLE-OID instances
> which already created in current lisp image, so that few SIMPLE-OID
> created when repeat do SNMP-WALK on same MIB node. The key of this
> hash table would be a "oid number list" as a list, and the value would
> be the correspond SIMPLE-OID instance.
>
> Since "weak hash table" is not in CL standard, I'll support only a few
> implementations included at least LispWorks, AllegroCL and SBCL, and
> make a new "ASN.1 feature" (OID-CACHE) for this work. Do you think
> this features would be useful for you?

I think this might be a bad idea and probably will decrease performance
on our workload, as we have many OIDs that are never seen again, so
putting them into a weak hash-table just causes more problems for the
garbage collector (they are difficult to implement efficiently).

As I said before, the most sensible thing is probably just to use simple
vectors as OIDs.

[...]