Hi,
Josselin Poiret <d...@jpoiret.xyz> writes: > [[PGP Signed Part:Undecided]] > Hi everyone, > > Edouard Klein <e...@rdklein.fr> writes: > >> I think my misunderstanding boils down to a bad mental model of how guix >> works. >> >> What I imagine the "Computing guix derivation" step to be is no >> different than building a package whose inputs are the channels' >> sources, guile, and the current guix, and whose output is the new guix. >> >> Simon and Richard pointed out that the combinatorial combination of all >> possible input combination makes this hard to substitute, but I don't >> understand how its result, once in the store, can't lead to a simple >> linking from the profile to the store, instead of re-running the >> "Computing guix derivation" step when guix pull is called with the same >> inputs. >> >> Surely my mental model is wrong somehow ? > > You might be interested in this thread [1], which tries to explain the > terrible performance of `guix pull`. > > [1] mid:87wmxe3vsa....@jpoiret.xyz > https://yhetil.org/guix/87wmxe3vsa....@jpoiret.xyz/ > I reread it, but I still don't understand why this step is not substitutable. It has a fixed set of input and it is a deterministic process. Unless I don't understand what is going on, which is probable, but I can't seem to find where I'm mistaken. > Best,
