Caching is a critical technique for scaling APIs and delivering faster user experiences with lower resource consumption.

Types of Caching

Common approaches include client-side, server-side, and CDN caching.

Each serves to reduce repeated processing at different layers.

Cache Invalidation Strategies

Maintaining cache freshness requires effective invalidation on data changes.

Techniques include time-to-live (TTL) and event-based invalidation.

Choosing Caching Tools

In-memory stores like Redis and Memcached are popular for high-speed caching.

CDNs help cache static API responses closer to users.

Measuring Impact

Monitor cache hit ratios and latency improvements to evaluate effectiveness.

Adjust strategies based on usage patterns and performance goals.