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pre-connect to remote hosts #18539

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staabm opened this issue May 12, 2025 · 5 comments
Open

pre-connect to remote hosts #18539

staabm opened this issue May 12, 2025 · 5 comments
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@staabm
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staabm commented May 12, 2025 •
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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
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ddevsr commented May 13, 2025

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
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staabm commented May 13, 2025 •
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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
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Related: https://wiki.php.net/rfc/curl_share_persistence_improvement

@bukka
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bukka commented May 31, 2025

Are you basically talking about worker mode like in FrankenPHP? That's doable on the FPM side as well - it just requires a bit of works and few other things to work right in FPM and possibly in apache2handler.

@staabm
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staabm commented Jun 2, 2025 •
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No I don't mean worker mode.

I was asking for, whether it is possible to warmup connections to certain hosts (before they are actually required at runtime), so connection establish overhead (TLS handshake, TCP handshake,..) will not hit at runtime, but before a user sits in front and waits for the results synchronously

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@staabm @bukka @TimWolla @ddevsr