Hi Richard, Richard Sent <rich...@freakingpenguin.com> skribis:
>> I think channels listed in channels.scm files should optionally support >> using whatever channel version is already in the user's profile, if >> present. This would significantly speed up entering development >> environments composed of Guix channels. > >> Unfortunately, *I may be delayed every time I enter the development >> environment by several minutes while Guix computes a new derivation >> due to an update in %default-channels*. I understand and share the frustration regarding performance. To address the problem, I would suggest a different route (the problem with the patch you propose here is that it makes things unpredicatable and stateful: you’d end up using whatever commit happens to be already in a profile). My suggestion would be for ‘guix pull’ to populate the same cache that ‘guix time-machine’ uses. That way, if you time-travel to a commit you already have in a profile, it would be instantaneous. I started looking into it a while back and there were some complications, but I forgot the details. WDYT? Would this be an improvement for you? Thanks, Ludo’.
