Mechanical sympathy. And conventional low-latency systems do that as much as possible - binding all sorts of layers. When you're picking the first few bytes of

Mechanical sympathy. And conventional low-latency systems do that as much as possible - binding all sorts of layers. When you're picking the first few bytes of the packet and semi-parsing it, you don't traditionally and conventionally have that go through some vtable and perform dynamic dispatch to find the right parser or whatever. It's all plugged into everything monolithically.