Micro-benchmarking

Encode process, not target numbers. Numbers change; the workflow stays fixed.

Harness setup

Measuring a live page / tab / paint (DOM, RSC, navigation)?
├── Yes → Available browser tools + CDP is enough. Do not copy a µs harness.
│         Round 0 = nodes, images, TTFB, nav ms, heap. Report ms, not µs/op.
└── No (pure function / mapper / transform)
    ├── Harness exists in repo? → use tools/benchmark-*.mjs or scripts/bench/*
    └── No → copy from this skill's `scripts/` folder
             benchmark-harness.mjs + benchmark-run-all.mjs
             add package.json script: "benchmark": "bun tools/benchmark-run-all.mjs"