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Context API & Performance Optimization Patterns

SK
Dr. Sarah Kim
Advanced 34:20

In this lesson, we dive deep into React's Context API, exploring modern usage patterns, avoiding common performance pitfalls, and implementing optimized selectors. You'll learn how to split contexts, use `useMemo` effectively, and benchmark re-renders using React DevTools Profiler.


Key Topics Covered:

  • Context creation and provider patterns
  • Avoiding unnecessary re-renders
  • Custom hooks for context consumption
  • Performance profiling techniques
  • Lesson Slides.pdf
    2.4 MB
  • Starter Code & Exercises
    ZIP Archive • 1.8 MB
  • Official React Context Docs
    External Link
MR
Maria Rodriguez 2 hours ago

Great explanation of context splitting! I've been struggling with unnecessary re-renders in my dashboard app. Can you clarify when to use selector pattern vs memoization?

TK
Tom K. 5 hours ago

Quick question: Does the context value update strategy change in React 18+ with automatic batching?

AJ
Alex J. 1 day ago

The Profiler demo at 18:30 was incredibly helpful. Finally understand why my components were re-rendering!