- the Click modular router now runs (in userspace) at up to 4Mpps per core, which is faster than in-kernel linux; A userspace version of ipfw should be available in a short time, and i have some work in progress to bring the forwarding tables in userspace (but of course you can do the same with Click). I also see people start using it, which is a good thing because i am getting useful feedback on features and bugs and patches for more device drivers. [SKIPPED] On the general issue of improving performance of the network stack, I feel that to achieve significant speed improvements we should really reconsider the way things are done in the network stack. And that comes before support for special HW features.