FrontendHaltNetworking·Intermediate·Conceptual·1 min read
How does stale-while-revalidate help?
Short interview answer
It permits serving a stale response within a defined window while revalidation happens in the background, improving latency at the cost of bounded staleness. It suits data where that trade-off is acceptable.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.