The issue is that TLS handshakes are actually quite expensive. Assume a limit at about 3MHz of a modern non-hyperhtreaded core for each rps you want to do tls h

The issue is that TLS handshakes are actually quite expensive. Assume a limit at about 3MHz of a modern non-hyperhtreaded core for each rps you want to do tls handshakes for. This is <40kbit/s in each direction. That's a measly 2.5 Gbit/s symmetric on one of AMD's 64 core flagship processors. They can normally push out ~1Tbit/s http unencrypted if the SSDs keep up, or about 20~50% of that if they have to encrypt it. These numbers are all rough, but they are all for the absolute core/unflexible C-code that barely complies with the RFCs.