[autoresearch] baseline: system prompt quality tests (5/5 passing)

.agents/skills/perf-optimization/languages/rust.md

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+# Rust Performance Profiling
+
+> **Stub:** This module will be populated when Rust profiling is needed in a project.
+> Follow the pattern established in [go.md](go.md).
+
+## Expected Content
+
+- Toolchain: `perf`, `flamegraph`, `criterion`, `cargo-flamegraph`, `dhat`
+- Patterns: Arena allocation, `#[inline]`, zero-copy parsing, `Box` vs stack
+- Benchmarking: `criterion` setup, statistical comparison
+- Irreducible floors: syscall overhead, TLS handshake, memory-mapped I/O
+- Script: `scripts/rust-flamegraph.sh`