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bug#44053: Poor profile generation performance on spinning disks
From: |
Ludovic Courtès |
Subject: |
bug#44053: Poor profile generation performance on spinning disks |
Date: |
Tue, 29 Aug 2023 11:19:56 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Hi Luis,
Luis Felipe <luis.felipe.la@protonmail.com> skribis:
> I still use the same computer with the same hard drive, and performance has
> improved when installing packages. Running
>
> $ time guix package -i perl --max-jobs=1
>
> initially took
>
> (87 packages in profile)
> real 8m3,043s
> user 0m2,656s
> sys 0m0,239s
>
> But now (guix 17fadbb), it takes
>
> (96 packages in profile)
> real 3m51,058s
> user 0m7,490s
> sys 0m0,788s
I think it’s not good.
Could you time just profile generation itself?
To do that, you need to find the profile generation and then to rebuild
it, along these lines:
DRV=$(guix gc --derivers $(readlink -f ~/.guix-profile))
time guix build --check $DRV
The thread contains an analysis of specific sources of slowness, such as
the cost of building the XDG MIME database:
https://issues.guix.gnu.org/44053
I think we’re not done; we can probably do better by first figuring out
which parts take time (profiling) and then addressing specific issues.
Ludo’.