tls-pq-bench

Reproducible benchmarking harness for comparing TLS 1.3 key exchange configurations.

Features

• Key Exchange Modes

  • Classical: x25519
  • Hybrid PQ: x25519mlkem768 (via rustls + aws_lc_rs)

• Metrics

  • Handshake latency (nanoseconds)
  • TTLB - Time-to-Last-Byte (nanoseconds)

• Benchmark Control

  • Warmup iterations (excluded from results)
  • Configurable iterations
  • Concurrency control (parallel connections)
  • Configurable payload sizes

• Reproducibility

  • Structured logging (tracing)
  • Run ID for correlating logs
  • Rust version, OS, arch recorded
  • Command line arguments logged
  • Negotiated cipher suite logged

• Matrix Benchmarks

  • TOML configuration file support
  • Run multiple benchmark configurations sequentially
  • Each configuration: mode, payload, iters, warmup, concurrency

Quick Start

Build

cargo build --release

Run Single Benchmark

Terminal 1 - Start server:

./target/release/server --mode x25519 --proto raw --listen 127.0.0.1:4433

Terminal 2 - Run benchmark:

./target/release/runner --server 127.0.0.1:4433 --proto raw --mode x25519 --iters 100 --warmup 10

Run Matrix Benchmarks

Create a config file (benchmarks.toml):

[[benchmarks]]
server = "127.0.0.1:4433"
proto = "raw"
mode = "x25519"
payload = 1024
iters = 100
warmup = 10
concurrency = 1

[[benchmarks]]
server = "127.0.0.1:4433"
proto = "http1"
mode = "x25519mlkem768"
payload = 1024
iters = 100
warmup = 10
concurrency = 1

Run:

./target/release/runner --config matrix.toml

Output

Results are emitted as NDJSON to stdout or a file:

{"iteration":0,"mode":"x25519","payload_bytes":1024,"handshake_ns":500000,"ttlb_ns":650000}
{"iteration":1,"mode":"x25519","payload_bytes":1024,"handshake_ns":490000,"ttlb_ns":620000}

Logging

Enable debug logs with RUST_LOG:

RUST_LOG=info ./target/release/runner --server 127.0.0.1:4433

Output includes:

• Run ID for correlation
• Rust version, OS, arch
• Command used
• Negotiated cipher suite
• Benchmark configuration

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.