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perf: Web Vitals, caching, fonts, and prefetching optimization - #572
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Darkvader-ship-it merged 1 commit intoOct 18, 2026
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Darkvader-ship-it merged 1 commit into
Darkvader-ship-it merged 1 commit into
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Add comprehensive font-loading optimizations with CLS containment: - Font display strategy with swap/optional for progressive loading - Size containment on body to prevent layout shifts - Latin-only font subset for faster parsing Implement Web Vitals monitoring and CI budget gates: - WebVitalsReporter component tracks LCP, FID, CLS, TTFB, INP - Automatic metric rating system (good/needs-improvement/poor) - GitHub Actions workflow validates performance budgets - GA4 integration for production RUM pipeline Configure edge and full-route caching strategy: - Immutable caching for static assets and fonts (1 year) - Stale-while-revalidate for HTML pages (1h edge + 24h stale) - CDN matrix with route-specific cache headers - Automatic Vercel edge revalidation support Add intent-based link prefetching and route preloading: - useLinkPrefetch hook with hover/touch intent detection - useRoutePreload for preloading critical routes - Automatic deduplication and error handling - LinkPrefetchProvider integration for app-wide prefetching Closes PHASE-STELLAR#515 Closes PHASE-STELLAR#519 Closes PHASE-STELLAR#516 Closes PHASE-STELLAR#521
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Summary
Implements comprehensive web performance optimizations across four key spikes:
Changes
Font Optimization (#515)
app/layout.tsx: Configured font display properties (swap/optional)app/globals.css: Added CLS containment with size constraintsWeb Vitals Monitoring (#519)
components/web-vitals-reporter.tsx: Core metrics tracking (LCP, FID, CLS, TTFB, INP).github/workflows/web-vitals-budget.yml: CI budget validationCaching Strategy (#516)
next.config.mjs: Enhanced headers with multi-layer cache configurationLink Prefetching (#521)
hooks/use-link-prefetch.ts: Intent-based prefetch with hover/touch detectioncomponents/link-prefetch-provider.tsx: App-wide prefetch providerDocumentation
docs/PERFORMANCE.md: Comprehensive performance guideTesting
Performance Impact
Closes #515
Closes #516
Closes #519
Closes #521