react-vite-performance-reviewer

Review React and Vite web app code changes for browser performance, memory usage, CPU pressure, bundle size, network cost, rendering speed, hydration cost, and behavior under high traffic, slow devices, weak networks, and large datasets. Use when reviewing apps/web, libs/* used by the web app, or any React component, hook, route, Vite config, code split boundary, dynamic import, asset, state manager, API call, form, table, chart, animation, or third-party library. Activate when the user says "review", "check perf", "slow page", "heavy bundle", or whenever React/Vite browser code is in scope. Detects: unnecessary re-renders, unstable props/callbacks, context churn, missing memoization, memory leaks, large bundle growth, unused dependencies, inefficient asset loading, render-blocking resources, over-fetching, repeated network requests, poor cache strategy, large JSON payloads, expensive sync computations, layout thrashing, slow startup paths, and weak error/retry behavior.