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HTTP/3: Practical Deployment Options (Part 3)

Smashing Magazine

This approach was touted to be better for fine-grained caching because each subresource could be cached individually and the full bundle didn’t need to be redownloaded if one of them changed. Upon receipt of a valid Alt-Svc header indicating HTTP/3 support, the browser will cache this and try to set up a QUIC connection from then on.

Network 105
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HTTP/3: Performance Improvements (Part 2)

Smashing Magazine

However, TCP is typically implemented in the operating system’s (OS’) kernel, a secure and more restricted environment, which for most OSes isn’t even open source. Other causes of packet loss can lead to fewer or individual packets becoming lost (or unusable), especially on wireless networks. Did You Know? also needs to execute.