FrontendHaltNetworking·Advanced·Conceptual·1 min read
Can HTTP/2 server push improve performance?
Short interview answer
In theory it let the server send resources before the client asked, but in practice it often pushed things already cached, wasting bandwidth, and was hard to tune. It has been deprecated or removed in major browsers in favor of preload and Early Hints.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.