> <128-bit whining> So what? Didn't you notice that the 128 bits are split in half: {network|host}? Anything that needs to route things around is only concerne

> <128-bit whining> So what? Didn't you notice that the 128 bits are split in half: {network|host}? Anything that needs to route things around is only concerned about the first 64 bits. Once you're hitting on the local scope the last 64 bits is what matters ~99.9% of the time. So you can have your efficient 64-bit comparison right there for most of the traffic.