FrontendHaltReact·Intermediate·Conceptual·1 min read
What is the cost of overusing memoization?
Short interview answer
Every memoized value adds a dependency comparison on each render and holds extra memory for the cached result. Applied indiscriminately, the comparison overhead across a large tree can exceed the cost of the renders it was meant to prevent.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.