Aug 5, 2026, 8:37 AM@dascandy hm, I must be misremembering things, sorry. I don't think anyone anywhere implements it though. libcurl does not support it for h3.
- Aug 5, 2026, 8:37 AM
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Peter Bindelsdascandy@infosec.exchangeAug 5, 2026, 8:54 AM@bagder iirc the big problem was that it's nearly always just adding overhead, and in case of HTTP2 doing Head-Of-Line blocking too, making it a net negative in almost all cases. In HTTP3 they fixed the HOL blocking, but it's still only useful if there is something the client wants, cannot know that it should request, and is very urgent / time-dependent to the point of needing a few RTTs saved. Which for regular web servers is extremely close to nothing... and arguably you could always have an active websocket on a channel in http2 or 3 that does exactly what your push would do to accomplish the same.
- Aug 5, 2026, 8:56 AM
@dascandy yes, that's what everyone learnt why sever push is going away everywhere.