bug#43516: closed ([PATCH core-updates] packages: Enable multi-threaded xz compression when repacking source.)

[GNU bug Tracking System]

Your message dated Thu, 08 Oct 2020 22:17:36 -0400
with message-id <87o8lcrvlr.fsf@gmail.com>
and subject line Re: [bug#43516] your mail
has caused the debbugs.gnu.org bug report #43516,
regarding [PATCH core-updates] packages: Enable multi-threaded xz compression 
when repacking source.
to be marked as done.

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43516: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=43516
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> --- Begin Message ---
>
>
>
> Subject: 
>
> [PATCH core-updates] packages: Enable multi-threaded xz compression when repacking source.
>
>
>
>
> Date: 
>
> Sat, 19 Sep 2020 13:03:57 -0400
>
>
>
>
> The xz compression is slow; using multiple threads/cores yields a linear
> performance improvement.
>
> * guix/packages.scm (patch-and-repack): Ensure xz is invoked with --threads=N
> by setting the XZ_DEFAULTS environment variable.
> ---
>  guix/packages.scm | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/guix/packages.scm b/guix/packages.scm
> index 6598bd3149..678007a807 100644
> --- a/guix/packages.scm
> +++ b/guix/packages.scm
> @@ -5,6 +5,7 @@
>  ;;; Copyright ?? 2016 Alex Kost <alezost@gmail.com>
>  ;;; Copyright ?? 2017, 2019, 2020 Efraim Flashner <efraim@flashner.co.il>
>  ;;; Copyright ?? 2019 Marius Bakke <mbakke@fastmail.com>
> +;;; Copyright ?? 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
>  ;;;
>  ;;; This file is part of GNU Guix.
>  ;;;
> @@ -693,6 +694,11 @@ specifies modules in scope when evaluating SNIPPET."
>              (setenv "PATH" (string-append #+xz "/bin" ":"
>                                            #+decomp "/bin"))
>  
> +            ;; Enable multi-threaded compression for xz.
> +            (setenv "XZ_DEFAULTS" (string-append "--threads="
> +                                                 (number->string
> +                                                  (parallel-job-count))))
> +
>              ;; SOURCE may be either a directory or a tarball.
>              (if (file-is-directory? #+source)
>                  (let* ((store     (%store-directory))
> -- 
> 2.28.0
>
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: [bug#43516] your mail
>
>
>
>
> Date: 
>
> Thu, 08 Oct 2020 22:17:36 -0400
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)
>
>
>
>
> Leo Famulari <leo@famulari.name> writes:
>
> > On Mon, Sep 21, 2020 at 10:00:02PM -0400, Maxim Cournoyer wrote:
> >> Seems we can have our cake and eat it, too!
> >
> > Amazing! I don't have time to check it myself but please proceed as you
> > see fit.
>
> Pushed with commit 5a0997ef7f to core-updates.
>
> Enjoy!
>
> Maxim
>
>
> --- End Message ---