Re: [quicwg/base-drafts] First pass at 7, 14, and 30-bit varint packet numbers (#1334)

[MikkelFJ <[e-mail]>]

I'm just wondering if 30 bits is sufficient? It effectively only allows for 2^29 packets outstanding which are half a million. Som NIC's push 40 mpps although probably only sustainable at low RTT.

At the other end, I'm guessing that 3 byte packet numbers are going to be the most needed packet number range: 2^22 / 2 * 1500 / sec = 3MB/s or 30Mbps which is a likely limit on domestic streaming video these days.

For these reasons, perhaps a modulo 128 schema where bit 7 of each byte, except the last is set. It would also future proof the design at much higher transmission rates and possibly above 2^62 packet number limit.

I do dislike this modulo 128 design and it goes against other varint encodings, but there are the arguments above.

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