Nineteen Objects Six Sockets
A cold page load from one HTTPS origin. The round trip time is 40 ms, DNS is already cached, and server processing plus transfer time are zero. The browser opens 6 parallel HTTP/1.1 connections at ; each needs one round trip for the TCP handshake and one more for a full TLS 1.3 handshake before it can carry a request. The page is 1 HTML document plus 18 images from the same origin, and the browser only learns about the images once the HTML arrives.
What is the earliest the 18th image can arrive?
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