Caching
Advanced·25 min read·Lesson 3 of 4·○Not Started
Caching is one of the most effective performance optimization strategies. Proper caching reduces server load, network bandwidth, and improves page load times.
Types of Caching
- Browser cache: stores resources locally based on HTTP headers
- Service worker cache: programmatic caching with Cache API
- CDN cache: edge caching for static assets
- Memory cache: in-memory caching for computed data
HTTP Caching Headers
Cache-Control, ETag, and Last-Modified headers control how browsers cache resources. Understand max-age, no-cache, no-store, stale-while-revalidate, and immutable directives.