𝗛𝗼𝘄 𝗧𝗼 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗲 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲

𝗛𝗼𝘄 𝗧𝗼 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗲 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲

Slow pages lose money. A one second delay cuts conversions by 7 percent. Fast sites win.

Measure first. Use Lighthouse or WebPageTest. Focus on LCP, FID, and CLS. Do not guess.

Fix images first. Use WebP or AVIF formats. Use lazy loading. This cuts image weight by 80 percent.

Shrink your JavaScript. Split your code. Use dynamic imports. Keep the initial load under 200KB.

Fix your fonts. Use font-display: swap. Set Cache-Control headers. Use a CDN to lower latency.

Keep state local. Use TanStack Query for server data. Stop over-engineering your state.

Build for the user. Not for the developer. Test with real browsers.

Your plan:

• This week: Run a Lighthouse audit. Fix three issues.
• This month: Test for accessibility. Fix critical errors.
• This quarter: Build a design system.

Source: https://dev.to/therizwansaleem/how-to-optimize-frontend-performance-a-hands-on-tutorial-jm7