ReactPerformanceNext.js

Optimizing React Performance: Real-world Lessons

1 min read•3/1/2024

Optimizing React Performance: Real-world Lessons

Working on high-traffic telecom applications taught me that performance isn't optional — it's a feature.

The Problem

Our app was slow. Users on mobile networks complained about load times. Core Web Vitals were poor.

What Worked

  • Bundle Analysis - Used webpack-bundle-analyzer to find bloated dependencies

  • Image Optimization - Implemented Next.js Image component with proper sizing

  • Code Splitting - Lazy loaded routes and heavy components

  • Memoization - Strategic use of useMemo and React.memo

    • Results

  • • 13% faster page load

  • • 40% smaller initial bundle

  • • Improved Core Web Vitals scores

    • Performance optimization is iterative. Measure, optimize, repeat.