- UnitResult.timing (not in the report): wall time of case building,
run_cpp, run_rust, compare and the slowest Rust case; main prints
`TIME <unit> ...` to stderr per unit
- DIFFTEST_RUST_DIGEST=<dir>: writes <dir>/<unit>.digest with one
`<case>\t<fnv1a64 of format!("{rust_output:?}")>` line per case, so two
builds can be proved bit-identical; off by default
- README: --green takes ~35 min on 16 threads (not ~2 min), TIME line,
digest, and scripts/perf (ptrace sampler + analyzer, no sudo needed)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01H9QwJFBTKLZ9FFK3nVd1X4
Thijs Damsma