Pinterest moves to HTTP/3
Pinterest moves to HTTP/3 on all their clients and edge CDNs this year. They witnessed interesting gains but not without good lesson learned. The main one was the mismatch of alt-svc vs DNS ttls.
I cover this on the next episode of the backend engineering course.
0:00 Intro
2:00 Moving h2 to h3 through alt-svc
5:00 Why HTTP/3
6:00 HTTP/1 vs HTTP/2
9:00 TCP Head of Line blocking in HTTP/2
11:00 How HTTP/3 addresses HOL
12:15 Connection Migration
13:30 Stream level congestion control
14:10 1-RTT - 0-RTT
15:41 Pinterest challenges moving HTTP/3
19:00 Migration
21:15 Future work
22:30 Summary
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