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Subject: |
Enable threaded compression of source tarballs |
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Date: |
Thu, 30 Mar 2017 18:17:15 -0400 |
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User-agent: |
Mutt/1.8.0 (2017-02-23) |
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
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Subject: |
Re: Enable threaded compression of source tarballs |
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Date: |
Sat, 15 Apr 2017 18:35:58 -0400 |
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Mutt/1.8.1 (2017-04-11) |
On Thu, Mar 30, 2017 at 06:17:15PM -0400, Leo Famulari wrote:
> 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.
> From 78547a09e50440c649c3d28d7691f32fdd47cc25 Mon Sep 17 00:00:00 2001
> From: Leo Famulari <address@hidden>
> Date: Thu, 30 Mar 2017 03:10:48 -0400
> Subject: [PATCH] packages: Enable threaded compression of source tarballs.
>
> This provides a ~2x speedup when using 4 threads.
>
> * guix/packages.scm (patch-and-repack)[build]: Invoke xz with
> '--threads=0' when re-packing tarballs.
I pushed this to core-updates as
c8a3dea847bb9f87fa1876d0c6c3356d6226f121.
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