Today we’ll dive into insights from Chrome’s networking stack to provide clarity on how web loading primitives (like <link rel=“preload”> & <link rel=“prefetch”>) work behind the scenes so you can be more effective with them. As covered well in other articles, preload is a declarative fetch, allowing you to force the browser to make a request for a resource without blocking the document’s onload e
The "simple" act of initiating an HTTP request can incur many roundtrips before the actual request bytes are routed to the server: the browser may have to resolve the DNS name, perform the TCP handshake, and negotiate the TLS tunnel if a secure socket is required. All accounted for, that's anywhere from one to three — and more in unoptimized cases — roundtrips of latency to set up the socket befor
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