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bug#26225: [PATCH] guix: Compress and decompress xz archives in parallel
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From: |
Leo Famulari |
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Subject: |
bug#26225: [PATCH] guix: Compress and decompress xz archives in parallel. |
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Date: |
Thu, 30 Mar 2017 18:22:35 -0400 |
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User-agent: |
Mutt/1.8.0 (2017-02-23) |
Efraim Flashner wrote:
> * guix/scripts/pack.scm (%compressors): Add flag '-T0' when calling "xz".
> * guix/utils.scm (decompressed-port, compressed-port,
> compressed-output-port): Same.
> --- a/guix/utils.scm
> +++ b/guix/utils.scm
> @@ -154,7 +155,7 @@ a symbol such as 'xz."
> (match compression
> ((or #f 'none) (values input '()))
> ('bzip2 (filtered-port `(,%bzip2 "-dc") input))
> - ('xz (filtered-port `(,%xz "-dc") input))
> + ('xz (filtered-port `(,%xz "-dc -T0") input))
> ('gzip (filtered-port `(,%gzip "-dc") input))
> (else (error "unsupported compression scheme" compression))))
Parallel decompression isn't implemented yet, but the extra '-T0' option
doesn't seem to break anything.
The changes LGTM.
I sent a companion patch to <https://bugs.gnu.org/26316> that enables
threaded compression when building source tarballs.
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