GNU bug report logs - #26316
Enable threaded compression of source tarballs

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From: Leo Famulari <leo <at> famulari.name>
To: 26316 <at> debbugs.gnu.org
Subject: bug#26316: Enable threaded compression of source tarballs
Date: Thu, 30 Mar 2017 18:17:15 -0400

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This patch enables multi-threaded xz compression in the repacking stage
of building source tarballs.

With it applied, I get a ~2.2x speedup building the source of
linux-libre with 4 threads, compared to 1 thread.

Specifically, with the upstream linux-libre tarball in the page cache,
`guix build -S linux-libre` took ~366 seconds using a single thread for
xz, and ~164 seconds using 4 threads.

[0001-packages-Enable-threaded-compression-of-source-tarba.patch (text/plain, attachment)]

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