React Hook Form

A solid collection of 41 performance rules organized by impact level, from critical form configuration choices like using onSubmit validation mode to smaller optimizations around field arrays and component integration. Most valuable for the subscription patterns, which are where React Hook Form performance actually lives or dies. The useWatch versus watch distinction alone saves countless re-renders. Categories are well thought out with clear prefixes for navigation. Covers the common pain points like shadcn Select wiring and Material-UI Controller patterns. Strictly client-side validation, so if you're doing React 19 Server Actions, this won't help. Best applied during initial form setup rather than as a debugging tool after things are already slow.