Lucas and Luna unpack a real-world performance bottleneck that silently plagues many React applications: unnecessary re-renders caused by unstable callback references. Using a concrete example from a mid-size e-commerce site, they walk through how useCallback and useMemo work under the hood, when they actually help, and when they make things worse. They also reveal one surprising React profiler reading that showed a 400-millisecond render delay from a single inline arrow function. If you write React code—or review it—this episode will change how you think about component memoization.

#React #Performance #WebDev #Frontend #JavaScript #useCallback #useMemo #Rendering #Optimization #DeveloperTools #ReactProfiler #TechPodcast #SoftwareEngineering #WebDevelopment #FexingoBusiness #BusinessPodcast #CodeReview #ComponentDesign

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