On Nov 23, 2016 10:22 AM, "Jeremy Harris" <j...@wizmail.org> wrote: > > On 23/11/16 08:50, Yoav Nir wrote: > > As long as you run over a network that has a smallish MTU, you’re going to incur the packetization costs anyway, either in your code or in operating system code. If you have a 1.44 GB file you want to send, it’s going to take a million IP packets either way and 100 million AES block operations. > > Actually, no. Everybody offloads ether-frame packetization and TCP > re-segmentation to the NIC, talking 64kB TCP segments across the NIC/OS > boundary.
Who is 'everybody'? Let's look at the cost more exactly. We always have to copy from the storage to the network. Packetization copies a tiny bit more data on each packet. Maybe if you have special PCI DMA between devices, but that is rare. > > Precisely because of the packetization cost. > -- > Jeremy > > _______________________________________________ > TLS mailing list > TLS@ietf.org > https://www.ietf.org/mailman/listinfo/tls
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