From: Stephen Hemminger [off-list ref]
   Date: Mon, 9 Jun 2003 09:23:27 -0700

   Has anyone looked into using Judy array's to speedup the route
   cache.   HP has opened it up (see
   http://sourceforge.net/projects/judy ) and it should have better
   scaling for these type of attacks.
   
Like all such seemingly promising schemes, insert/retrieve are
optimized at the expense of delete.

I normally don't even look at such algorithms anymore, they all
are amazing if you only build tables and look for things in them
but are unusable when O(1) insert/delete/lookup are absolutely
required.