chapter.checkpoint
Performance Fundamentals
Pause here and make sure the main ideas feel clear before moving to the next chapter.
Review recommended
What you should understand now
Learn the beginner-safe performance ideas before advanced optimization.
Rendering cost
Understand why components render again.
React.memo
Skip rerenders for unchanged props when useful.
Code splitting idea
Load heavy UI only when needed.
progress.review
Chapter progress
Lessons completed
0/3
0% complete
Exercises attempted
0/3
0% complete
Quizzes passed
0/1
0% complete
Before you move on
Use this quick review if anything still feels unclear.
Review chapterRetake chapter quiz
Complete the lessons, pass the exercises, and pass the quiz to unlock the next chapter.