Most of the userspace high-performance networking stuff is still pretty exotic. It requires plenty of tuning, specific network hardware, and sometimes extreme c

Most of the userspace high-performance networking stuff is still pretty exotic. It requires plenty of tuning, specific network hardware, and sometimes extreme conditions, to be viable. DPDK does not work on the wireless connection I'm using to post this reply, for example (nor any wireless connection for that matter). Meanwhile, if you're not doing that: Wireguard can avoid lots of syscall and copying overhead plus some magic CPU register overhead by being in the kernel. Hence this almost certainly makes wg faster on the net because it can't pick and choose what environments it runs in.