bug#45323: [PATCH] substitute: Reuse connections for '--query'.

[Ludovic Courtès]

Ludovic Courtès <ludo@gnu.org> skribis:

> This significantly speeds up things like substituting the closure of a
> .drv.  This is a followup to 5ff521452b9ec2aae9ed8e4bb7bdc250a581f203.
>
> * guix/scripts/substitute.scm (http-multiple-get): Add #:open-connection
> and #:keep-alive? and honor them.
> (open-connection-for-uri/maybe): Use 'open-connection-for-uri/cached'
> instead of 'guix:open-connection-for-uri'.  Call 'http-multiple-get'
> within 'call-with-cached-connection'.
> (open-connection-for-uri/cached): Add #:timeout and #:verify-certificate?
> and honor them.
> (call-with-cached-connection): Add 'open-connection'  parameter and
> honor it.
> ---
>  guix/scripts/substitute.scm | 97 ++++++++++++++++++++++---------------
>  1 file changed, 59 insertions(+), 38 deletions(-)

Pushed as be5a75ebb5988b87b2392e2113f6590f353dd6cd!

You can check the effect by running ‘guix build XYZ.drv’, where XYZ.drv
is not available locally yet.

Ludo’.