Run generator scripts from the repository checkout. Baseline is fed41fa88b and candidate is PR15096. Scripts use the existing Metro Hermes module registry. Set environmentId to a synthetic fixture environment with a loaded shell snapshot. Evaluate generated JS in Hermes through its CDP Runtime.evaluate, then retrieve global.__cacheBenchResults or global.__cacheActiveResults after completion. Do not rely on awaitPromise with React Native Promise polyfills. Nine alternating before/after pairs; discard first two pairs. activeMs subtracts waits between host timer registration and callback; it is elapsed instrumentation, not CPU samples. Uninstrumented samples are included to expose measurement overhead. Existing iOS1.3.1 native dev shell, current JavaScript, Mac mini simulator. Isolated repeat disables other dev connections temporarily. No secrets or customer conversation content are in this archive.