Regarding bring lazy on the serialization... yeah packed structures make sense. But excess padding is still wasteful, and endianness is only a bswap away, whic

Regarding bring lazy on the serialization... yeah packed structures make sense. But excess padding is still wasteful, and endianness is only a bswap away, which is 1-2 cycles apiece and so won't exactly break the latency budget (per Agner Fog's wonderful pdf, looking at Haswell).