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Re: Speeding up “guix pull”: splitting modules

From: Ludovic Courtès
Subject: Re: Speeding up “guix pull”: splitting modules
Date: Wed, 08 Jan 2020 22:57:00 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

BTW, there’s also the “Compute Guix derivation” phase that could be sped
up, and that’s mostly independent of Guile.

Things that could help include: “recursive Nix”¹ (the Guix derivation
would itself be the result of a derivation, thus subject to
substitutes), or something equivalent without special daemon support
where we’d simply embed (guix derivations) & co. to compute the
derivation in memory.

Another less elegant option would be to resort to a service (Data
Service or Cuirass) that would map a Guix commit to its .drv, and then
fetch that .drv from substitute servers and build it.

Finally, we could/should also profile that phase and see what can be

Lastly :-), it would be great to profile this phase over time to see how
it evolves.  (Does the Guix Data Service already stores timings for such



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