Frontend Performance Budgets for B2B SaaS Dashboards
Set JS bundle limits, lazy-load admin modules and measure Core Web Vitals on authenticated pages.
Mehran Shafique · June 13, 2026 · 1 min read · 92 words
B2B users tolerate less than consumers think. Slow admin panels mean support tickets. We set performance budgets per route: max 150KB gzipped JS for dashboard shells, 300ms interaction delay targets.
Code splitting by role
Lazy-load modules admins never use. Teachers see gradebook; accountants see billing — not both bundles on first paint.
Data fetching
Paginate aggressively. Virtualise long tables. Debounce search inputs hitting APIs. Cache reference data in React Query with stale-while-revalidate.
Measure continuously
Lighthouse CI on staging, Real User Monitoring in production. Track LCP on login and first dashboard load separately.
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