Performance Basics

Caching, load balancing, and database optimization.

Redis Caching
cached = redis.get(f"user:{user_id}")
if not cached:
    user = db.query(user_id)
    redis.set(f"user:{user_id}", user, ex=3600)

Scaling Strategies

Horizontal scaling, database sharding, CDN.

TechniqueBenefit
Load BalancingDistribute traffic
CachingReduce latency
ShardingScale database

Global Scale

Multi-region deployment, edge computing, performance monitoring.

Facebook Scale

Serves 2+ billion users with <200ms latency