Profile before optimizing (Rust)

Steps

1. 1Define target metric: p95 latency? memory ceiling? throughput?
2. 2Build benchmark using PRODUCTION-shaped data volumes
3. 3Profile CPU + memory + allocations; identify top three offenders
4. 4Optimize one offender at a time; re-measure after each change
5. 5Check second-order effects: cache misses, GC pressure, lock contention
6. 6Record before/after numbers in the PR for future archaeologists
7. 7Let the borrow checker guide design; resist RefCell escapes
8. 8Benchmark criterion suites for hot paths before optimizing

Common Pitfalls

• ▲Optimizing intuition while profile shows I/O waits
• ▲Micro-benchmarks on toy data lying about production

Commands

$ npx skills add aniruddhaadak80/skills --skill code-quality-performance-profiling-rust

$ npx skills add aniruddhaadak80/skills --skill code-quality-performance-profiling-rust -g

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