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Performance Optimization

We audit, refactor, and hyper-optimize legacy codebases, shrinking bundle sizes and achieving perfect Core Web Vitals.

Answer summary

BuildDigital optimizes web performance for Google Core Web Vitals — targeting sub-1.5s LCP, sub-0.1 CLS, and sub-200ms INP on mobile. Every audit delivers a prioritized fix list: bundle splitting, image format modernization (AVIF/WebP), critical CSS inlining, third-party script deferral, and React Server Component migration paths for legacy client-heavy apps.

Speed is Revenue

Amazon found that every 100ms of latency costs them 1% in sales. Google penalizes slow sites in search rankings. If your web application suffers from sluggish interactions, layout shifts, or bloated load times, you are actively losing customers.

The Art of Optimization

We dissect applications at the compilation level to extract every millisecond of performance.

  • Core Web Vitals Mastery: We systematically eliminate Cumulative Layout Shift (CLS), optimize Largest Contentful Paint (LCP) via critical CSS extraction, and fix Interaction to Next Paint (INP) issues by deferring heavy JS execution.
  • Bundle Size Reduction: We implement aggressive code-splitting, dynamic imports, and tree-shaking to reduce JavaScript payloads by upwards of 70%.
  • React Rendering Optimization: We resolve deep React re-render cascades using `useMemo`, `useCallback`, and strategic component decoupling, achieving buttery-smooth 60fps animations.

Frequently Asked Questions

What Lighthouse scores can you achieve?

Consistently 95+ on Performance, 100 on SEO, 95+ on Accessibility, and 100 on Best Practices for content-driven sites. For app-heavy pages (dashboards, editors) we target 85+ Performance since interactivity necessarily competes with pure paint speed. Every project ships with Lighthouse CI in the deploy pipeline blocking regressions.

How do you fix Largest Contentful Paint (LCP)?

LCP fixes typically involve four moves: (1) prioritize the hero image with fetchpriority='high' and preload, (2) convert to AVIF or WebP with responsive srcset, (3) inline critical CSS for above-the-fold, (4) eliminate render-blocking third-party scripts via async/defer or lazy-load. We regularly move LCP from 4s+ to under 1.5s.

Do you offer one-off performance audits?

Yes. Our fixed-price performance audit ($6,000, delivered in 5 business days) covers Lighthouse mobile + desktop, WebPageTest waterfall analysis, bundle composition report, and a prioritized fix list with effort/impact ratings. Implementation is optional and separately quoted.

Ready to build your performance optimization?

Backed by 3+ years of proven delivery, we deliver clean code, modern UI UX design, and on-time market-ready solutions. Let's discuss your custom enterprise architecture today.

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