rustperf

Scope note: rustperf is dedicated Rust (edition 2021+). Heuristic lint only; measure with criterion / cargo bench before escalating.

Rust performance notes, small examples, and rustperf-lint.

Part of XPerf. Shared docs: docs/README.md. The lint is heuristic (corpus-ready: yes — r4 6×TP on clap; rs-alloc-hot=off; rs-format-rebind-hot=error ~99×; rs-println-hot/rs-collect-vec-hot=hint; all six rules have measured JSONL). Guide v0.

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• English guide (v0) — from docs/guide-src/
• rustperf-lint — rs-alloc-hot–rs-collect-vec-hot
• Corpus pins

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Avoid alloc/clone in hot loops, prefer with_capacity before sized push loops, avoid per-iter collect::<Vec<_>>, prefer write! over format! rebind, keep println! out of tight loops.

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cd packages/rustperf/rustperf-lint && cargo build --release
./target/release/rustperf-lint path/to/sources
bash ../scripts/smoke-lint.sh
bash ../scripts/self-lint.sh

Exit 1 only for error-severity findings (hints exit 0 unless --strict-hints).

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docs/guide-src/   chapter sources
docs/             assembled guide + corpus.md + evidence-policy.md
evidence/         per-rule claim + measured JSONL; rs-format-rebind-hot error (~99×), others off/hint
examples/         tiny demos
rustperf-lint/    checker + fixtures
scripts/          smoke-lint.sh, self-lint.sh