References — fw-04 mini-react II: Batching, Scheduling, Deriving Fiber

Primary sources first. Read the real implementation after you have written yours, never before.

The scheduler

• react/packages/scheduler — read forks/Scheduler.js, specifically schedulePerformWorkUntilDeadline. It prefers MessageChannel over microtasks and setTimeout for reasons fe-01 (sibling project) measures directly: microtask yielding rendered 0 frames.
• react-reconciler/src/ReactFiberWorkLoop.js — the render/commit split and the interruptible work loop
• React Fiber Architecture — the data structure, explained before the code

Concurrent features

• React docs — startTransition · useDeferredValue · <Suspense>
• React 18 working group discussions — the design rationale, in public
• React Labs updates — where concurrent behaviour changes get announced

The platform underneath

• HTML Standard §8.1.7 — Event loops
• Prioritized Task Scheduling API — scheduler.postTask, scheduler.yield
• web.dev — Optimize long tasks — the ~5 ms yield budget

Related modules

• fe-01 — Execution model & scheduling (sibling project) — the measured substrate. Do this first; the design decisions here are unreadable without it.
• bi-11 — Blink scheduling — what the browser does with the tasks React posts
• fw-02 — mini-react core — stages 1–7

When a claim here proves stale, record it in PROGRESS.md section 7.