React Performance Engineering
Measure before you optimise. Profiling, render behaviour, concurrent features, and shipping less JavaScript.
Advanced2h 21m4 modules7.4k students
What you’ll learn
Measure honestly
Use the profiler and field metrics to find the real bottleneck instead of the one you assumed.
Control re-renders
Understand why a component re-rendered and fix the cause rather than papering over it with memo.
Use concurrent features
Keep the interface responsive during expensive updates with transitions and deferred values.
Ship less JavaScript
Split, lazy load, and prefetch so the bundle stops being the first thing that hurts.