Comment by toast0

I'm much less worried about tcp segmentation offload being disabled, than a single core, single threaded test. QUIC is going to hurt performance the most on multicore, multithreaded loads, where with TCP, you're getting the NIC to hash packets and deliver them to per-cpu rxqueues, and (hopefully) avoiding a lot of cross-cpu locking. That's going to be painful on QUIC unless/until you can get NICs to hash on the connection ids.