Push Cache (HTTP/2)
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The least-persistent caching layer in HTTP/2, storing server-pushed resources only for the lifetime of a single HTTP/2 connection. Unlike the browser cache, the push cache does not persist resources across page loads or tabs. Each H2 connection has its own push cache, and pushed resources are consumed once — subsequent requests for the same resource bypass the push cache and check the browser cache. Its limited utility has led to HTTP/2 push being removed from Chrome.