𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗚𝘂𝗶𝗱𝗲

𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗚𝘂𝗶𝗱𝗲

Slow pages lose money. A one second delay drops conversions by 7 percent. Speed is a business requirement.

Measure before you optimize. Use Lighthouse or WebPageTest. Track LCP, FID, and CLS. Focus on what matters.

Fix your images first.

• Use WebP or AVIF.
• Use srcset and sizes.
• Lazy load images.
• Compress files.

Reduce JavaScript bundles.

• Split your code.
• Lazy load non-essential parts.
• Use dynamic imports.
• Check bundles with webpack-bundle-analyzer.

Optimize your fonts.

• Use font-display: swap.
• Subset characters.
• Use variable fonts.
• Preload critical fonts.

Use caching and CDNs.

• Set Cache-Control headers.
• Use Service Workers.
• Use ETags.
• Serve content from a CDN to lower latency.

Monitor your site.

• Use Real User Monitoring.
• Use Lighthouse CI.
• Set performance budgets.

Source: https://dev.to/therizwansaleem/how-to-optimize-frontend-performance-a-hands-on-tutorial-36lg