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Starting as early as at least 2022-10-26, users may experience a significant performance degradation when enabling HTTP/3 on their sites. Users are advised to disable HTTP/3 for better performance.

Update: Improvements have been made to HTTP/3 performance recently that greatly reduce the impact of this regression.

Sources:

https://twitter.com/adam_janis/status/1617193830775660545
https://twitter.com/CherryJimbo/status/1628070338683625472

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