From: Leo Famulari <leo@famulari.name>
To: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Cc: 43516@debbugs.gnu.org
Subject: [bug#43516] [PATCH core-updates] packages: Enable multi-threaded xz compression when repacking source.
Date: Sat, 19 Sep 2020 15:38:05 -0400 [thread overview]
Message-ID: <20200919193805.GA31344@jasmine.lan> (raw)
In-Reply-To: <20200919170357.13583-1-maxim.cournoyer@gmail.com>
On Sat, Sep 19, 2020 at 01:03:57PM -0400, Maxim Cournoyer wrote:
> 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.
We tried this previous but reverted it because the archives were not
bit-reproducible:
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3e95125e9bd0676d4a9add9105217ad3eaef3ff0
It's really a shame... it would be nice to reduce the time used for XZ
compression. But the bandwidth used to move the results is even more
expensive in terms of time and money, since most people should get
substitutes.
next prev parent reply other threads:[~2020-09-19 19:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-19 17:03 [bug#43516] [PATCH core-updates] packages: Enable multi-threaded xz compression when repacking source Maxim Cournoyer
2020-09-19 19:38 ` Leo Famulari [this message]
2020-09-22 2:00 ` [bug#43516] Maxim Cournoyer
2020-09-22 2:00 ` [bug#43516] [PATCH core-updates v2] packages: Enable multi-threaded xz compression when repacking source Maxim Cournoyer
2020-09-22 15:19 ` [bug#43516] your mail Leo Famulari
2020-10-09 2:17 ` bug#43516: " Maxim Cournoyer
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