caching

Comprehensive caching strategies and patterns for performance optimization. Use when implementing cache layers, cache invalidation, TTL policies, or distributed caching. Covers Redis/Memcached patterns, CDN caching, database query caching, ML model caching, and eviction policies. Triggers: cache, caching, Redis, Memcached, CDN, TTL, invalidation, eviction, LRU, LFU, FIFO, write-through, write-behind, cache-aside, read-through, cache stampede, distributed cache, local cache, memoization, query cache, result cache, edge cache, browser cache, HTTP cache.