http2 over tls1.2 tls1.3 quic RTT对比
| method | HTTP/2 OVER TLS1.2首次连接 | HTTP/2 OVER TLS1.2连接恢复 | HTTP/2 OVER TLS1.3首次连接 | HTTP/2 OVER TLS1.3连接恢复 | HTTP/2 OVER QUIC首次连接 | HTTP/2 OVER QUIC连接恢复 |
|---|---|---|---|---|---|---|
| DNS解析 | 1RTT | 0RTT | 1RTT | 0RTT | 1RTT | 0RTT |
| TCP握手 | 1.5RTT | 1.5RTT | 1.5RTT | 1.5RTT | - | - |
| TLS握手 | 2RTT | 1RTT | 1RTT | 0RTT | - | - |
| QUIC握手 | - | - | - | - | 1RTT | 0RTT |
| HTTP Request | 1RTT | 1RTT | 1RTT | 1RTT | 1RTT | 1RTT |
| 总计 | 5.5RTT | 3.5RTT | 4.5RTT | 2.5RTT | 3RTT | 1RTT |