examples/bounce_bench drives file.bounce_mix on the built-in demo session (the same path the
Bounce dialog and soundcraft-cli --bounce use) and prints per-run wall time, so export speed can
be measured and compared between builds:
cargo run --release -p soundcraft-engine --example bounce_bench -- OUT.wav [reps] [JSON params]
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
