HTTP/2 Server Push

<p>HTTP/2 Server Push is an optional feature of the <a href="/facts/HTTP/2/L7V7rfeP">HTTP/2</a> and <a href="/facts/HTTP/3/SUASQpzB">HTTP/3</a> <a href="/facts/Communication_protocol/5uady7cB">network protocols</a> that allows <a href="/facts/Server-side/JqukWyaA">servers</a> to send resources to a <a href="/facts/Client%E2%80%93server_model/FSnf27C5">client</a> before the client requests them. Server Push is a performance technique aimed at reducing latency by sending resources to a client preemptively before it knows they will be needed. In practice, Server Push frequently results in wasted bandwidth because the server rarely knows which resources are already loaded by the client and transmits the same resource multiple times, resulting in slowdowns if the resources being pushed compete for bandwidth with resources that were requested.
</p><p>HTTP/2 Server Push is not a notification mechanism from server to client. Instead, pushed resources are used by the client when it may have otherwise produced a request to get the resource anyway.
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HTTP/2 Server Push open-in-new

HTTP/2 Server Push