2 投稿 のタグ "memoization"

TLDR:

React’s useCallback isn’t about making code “faster” by default—it’s about keeping function references stable so memoized components and hook dependencies behave predictably. This guide explains referential equality, the core performance use cases with React.memo and useEffect, common anti-patterns, and how Feature-Sliced Design supports scalable, low-coupling callback boundaries in large applications.

TLDR:

useMemo can speed up React apps by caching expensive derived data and stabilizing props for memoized children—but it can also add overhead when used blindly. This guide explains practical heuristics, profiling-driven decisions, and how Feature-Sliced Design reduces render churn by enforcing boundaries and public APIs.