LESSON 4.3
Images and fonts
Learn key techniques and workflows in React Performance Engineering.
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Overview
Images and fonts usually dominate loading performance and layout shift. Sizing, formats, and font display strategy fix most of it.
In this lesson you will:
- Serve correctly sized, modern image formats
- Reserve space so images do not shift the layout
- Choose a font loading strategy that avoids invisible text
Pro Tip
Use caching and revalidation wisely to ensure your app stays fast and data remains fresh without unnecessary requests.