pre-connect to remote hosts

[staabm]

Description

browser have a html tag to pre-connect to hosts, also bun (a competitor to nodejs) added support for pre-connecting to hosts, like databases, http-hosts etc.

the benchmarks shared by the bun team (see above links) look like there is a considerable amount of time to be saved, in case the connection is used often enough/the hosts have enough distance in between.

I wonder whether PHP could also provide such kind of startup-time pre-connect things so we don't need to re-establish connections at every request.
DNS resolution or TLS connection handshakes could already be completed before the PHP script beeing run even knows it will need it later

[ddevsr]

This is related to cURL? CURLOPT_FORBID_REUSE and CURLOPT_FRESH_CONNECT with false? or CURLOPT_RESOLVE for skip DNS resolution? Nice idea to have pre-connect at level startup time (FPM?)

+1 for me. Can you start writting RFC?

[staabm]

I think its related to anything which can open a stream. At best it would work for all/most SAPIs.

Maybe thats something which be be triggered during class-preloading. There might be a better alternative thought.

[TimWolla]

Related: https://wiki.php.net/rfc/curl_share_persistence_improvement