From: "Ludovic Courtès" <ludo@gnu.org>
To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: 47496@debbugs.gnu.org
Subject: bug#47496: Very slow `guix environment -l nyxt/build-scripts/guix.scm
Date: Fri, 02 Apr 2021 09:43:17 +0200 [thread overview]
Message-ID: <874kgp3ze2.fsf@gnu.org> (raw)
In-Reply-To: <87tuotez7x.fsf@ambrevar.xyz> (Pierre Neidhardt's message of "Tue, 30 Mar 2021 12:02:26 +0200")
Hi Pierre,
Pierre Neidhardt <mail@ambrevar.xyz> skribis:
> Nyxt provides a "guix.scm" to build Nyxt locally:
>
> https://github.com/atlas-engineer/nyxt/blob/3239b10d816861d329dce10863cb84f9d0bd76ed/build-scripts/guix.scm
>
> A few weeks ago (not sure exactly when and why), `guix environment -l
> guix.scm` started being extremely slow.
>
> By this, I mean that
>
> $ guix environment -v 99 --pure --load=build-scripts/guix.scm
On a warm cache, I get:
--8<---------------cut here---------------start------------->8---
$ time guix environment -l /tmp/nyxt/build-scripts/guix.scm -v2 -n -- true
22.0 MB would be downloaded:
/gnu/store/1dr7bkhy8f2v0kgpgm4swl0zrr740zwk-cl-webkit-2.4-10.0bc05cc
/gnu/store/bpw4k590597g0n7n868qhlsf2cnclzl0-webkitgtk-2.30.6-doc
/gnu/store/j67y7mzb5dyaqln90n3is85nz218bvxp-webkitgtk-2.30.6
real 0m6.060s
user 0m7.152s
sys 0m0.175s
$ time guix environment -l /tmp/nyxt/build-scripts/guix.scm -v2 -n --no-grafts -- true
La jena derivo estus konstruata:
/gnu/store/apk1g220mh4g2fzddxy28ssmk6fy9wbm-profile.drv
0.0 MB would be downloaded:
/gnu/store/1dr7bkhy8f2v0kgpgm4swl0zrr740zwk-cl-webkit-2.4-10.0bc05cc
The following profile hooks would be built:
/gnu/store/3qhdrwww3yidqk6w98md9w4yfqv7sx4l-xdg-desktop-database.drv
/gnu/store/7dnznrkrn5rajf60gfj0kvkgz5bylkdc-xdg-mime-database.drv
/gnu/store/86df5c3j48wg59yrrcqya1rskmwbqjqb-gtk-im-modules.drv
/gnu/store/9xjd6ax9hlmskhyagf46l28258azra0s-ca-certificate-bundle.drv
/gnu/store/bb583drg33kg138fb25cb0zd7hhgxzw2-glib-schemas.drv
/gnu/store/gw13b4ivyfzzvpdik3mgghx6n4ql8b6h-info-dir.drv
/gnu/store/p2srmzy6b08x7gbg8nvmxzrr6ypsrqiq-gtk-icon-themes.drv
/gnu/store/p3l0f5imh4021khfrnaqgk0xl5w5zmnh-fonts-dir.drv
/gnu/store/wsryc95x85d0qdavgiw4fy1qglam6b84-manual-database.drv
real 0m4.497s
user 0m5.719s
sys 0m0.151s
$ guix describe
Generacio 179 Mar 30 2021 11:00:56 (nuna)
guix 9098745
repository URL: https://git.savannah.gnu.org/git/guix.git
branch: master
commit: 9098745b181b3022587a35afd255f7ff1d41ac86
--8<---------------cut here---------------end--------------->8---
That’s still too long. The graft performance problem is what’s
discussed at <https://issues.guix.gnu.org/41702>. The ‘--no-grafts’
performance is not great either, and I wonder if it’s suboptimal
behavior in the presence of many propagated inputs.
> Something must be wrong, because I found a workaround that's fishy: if I
> comment out some inputs from the guix.scm and build the environment,
> then it works. Then I uncomment the commented inputs and this time the
> environment builds in a few seconds.
There was temporarily a performance regression regarding substitutes:
https://issues.guix.gnu.org/47283
Given what you describe, this sounds like a likely culprit. Would be
nice to see if after updating your daemon you still experience that kind
of behavior.
HTH,
Ludo’.
next prev parent reply other threads:[~2021-04-02 7:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-30 10:02 bug#47496: Very slow `guix environment -l nyxt/build-scripts/guix.scm Pierre Neidhardt
2021-04-02 7:43 ` Ludovic Courtès [this message]
2021-04-02 8:14 ` Pierre Neidhardt
2021-04-03 18:42 ` Pierre Neidhardt
2021-04-04 2:08 ` Bengt Richter
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