Pinterest moves to HTTP/3
The Backend Engineering Show with Hussein Nasser
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The Importance of Reverse Proxy in DNS
Not every client supported is the SVC B DNS record. The faster way is through an HTTP true frame. So you don't really need to send a request. Once you negotiate through a LPN and TLS, the server will push a frame to you that's Hey, alt service here. But clients are not are lacking behind anything with DNS just takes ages to implement.
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