Measure First

Optimize based on data, not intuition. Profiling reveals actual bottlenecks. Often the performance problem hides where developers assume.

Caching Strategies

Caching transforms slow operations into instant retrievals. Understand cache invalidation, TTL, and storage limits. Incorrect caching causes worse bugs than no caching.

Code Splitting

Loading only necessary code accelerates initial renders. Modern bundlers automate this optimization. Understanding mechanisms enables better architecture decisions.