Performance

How to Reduce Page Weight

The median web page is over 2MB. That's 4-8 seconds on a 4G connection in the developing world. Cutting page weight is the single highest-impact perf fix for most sites.

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Audit what's heavy

DevTools Network panel sorted by size shows the biggest culprits. Lighthouse 'reduce unused JavaScript' and 'reduce unused CSS' audits give specific bytes-savable numbers.

Image: WebP/AVIF + responsive sizes

Convert JPEG/PNG to WebP (saves ~50%) or AVIF (saves ~70%). Serve responsive sizes via — don't ship a 4K image to a phone showing a 600px slot.

JavaScript: tree-shake + code split

Tree-shaking removes unused exports — make sure your bundler does it. Code splitting loads route-specific code only when needed. Audit with bundlephobia.com — replace 50KB libraries with 5KB alternatives where possible.

Fonts: subset + preload

Subset web fonts to only the characters you actually use (saves 70%+). Preload the critical font with.

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