One Decade of Rustls: Evolution, Benchmarks, and Future Roadmap

Rustls turned ten, and the benchmarks are the story. Against OpenSSL 3.6.1 it handles 2,357 full handshakes per second, about 1.38x faster, and 1.92x on resumed handshakes, with 18 to 27% more throughput. Memory-safe TLS is no longer the slow, safe option. The 0.24 release adds external buffering and a split mode for full-duplex workloads, with a stable 1.0 API planned after that.