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From: "Ludovic Courtès" <ludo@gnu.org>
To: Luis Felipe <luis.felipe.la@protonmail.com>
Cc: 44053@debbugs.gnu.org, jbranso@dismail.de
Subject: bug#44053: Poor profile generation performance on spinning disks
Date: Tue, 29 Aug 2023 11:19:56 +0200	[thread overview]
Message-ID: <874jkiw6gz.fsf@gnu.org> (raw)
In-Reply-To: <dzkxWsiO2j2SlWZLTruNGXIELUDvT0_JRUOCJEnE2zlG13OyB1x6ohriYL8-mUHgg2mjtLoOXKASNm-bRVLw6tgkUrVgDH46PaNxdT4oXm8=@protonmail.com> (Luis Felipe's message of "Sun, 27 Aug 2023 17:59:28 +0000")

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’.




  reply	other threads:[~2023-08-29  9:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-18  3:35 bug#44053: Poor profile generation performance on spinning disks Maxim Cournoyer
2020-10-18 23:05 ` Luis Felipe via Bug reports for GNU Guix
2020-10-19  8:18 ` zimoun
2020-10-19 18:18   ` Maxim Cournoyer
2022-03-23 12:38 ` zimoun
2022-03-23 16:17   ` Maxim Cournoyer
2022-03-23 16:54     ` zimoun
2023-08-26 22:11 ` jbranso--- via Bug reports for GNU Guix
2023-08-27 17:59   ` Luis Felipe via Bug reports for GNU Guix
2023-08-29  9:19     ` Ludovic Courtès [this message]
2023-08-29 21:51       ` Luis Felipe via Bug reports for GNU Guix
2023-09-09 11:02         ` Ludovic Courtès

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