Avoid wasted DOM writes in React inputs — detect-before-write patching

Executive Summary

Many React applications suffer from repeated, unnecessary DOM writes to input elements—controlled components often assign the same value and still trigger layout/paint work—and this is especially painful in large SPAs and form-heavy products used by search, chat, and editor teams. Front-end engineers, platform teams at mid-to-large companies, and performance-focused SREs face this daily: a single high-traffic input path can add multiple milliseconds per keystroke and, in aggregate, account for 10–30% of render CPU on critical pages. You could build a detect-before-write patching product that combines an AST-based codemod to insert guards at compile-time with a lightweight runtime shim that no-ops redundant setValue/setAttribute operations while preserving React’s controlled-component semantics. Delivered as an npm package plus CI integration, preview-mode codemods, and telemetry, it would provide concrete KPIs (keystroke latency, TTI/CLS impact), aim for sub-millisecond overhead, and target a >90% safe automatic patch rate so teams can roll changes confidently. Market conditions make this attractive now: framework centralization concentrates impact across roughly 15M front-end teams (addressable market ~$30B at $2K ARR), performance-first initiatives increase willingness to buy tooling that measurably reduces wasted CPU, and AI-assisted codemods lower the cost of safe large-scale refactors. Competition is medium—profilers, runtime optimizers, and framework-level fixes exist—but you can differentiate by focusing narrowly on React input semantics, coupling static transforms with runtime safety and enterprise-grade rollout/rollback features; the key challenges are caret/selection edge cases, cross-version React internals, and building trust through conservative defaults and robust tests.