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guix: Compress and decompress xz archives in parallel. 

* guix/scripts/pack.scm (%compressors): Add flag '-T0' when calling "xz".
* guix/utils.scm (decompressed-port, compressed-port,
compressed-output-port): Same.
This commit is contained in:
Efraim Flashner 2017-03-23 11:47:32 +02:00
parent 6800c79701
commit 63102406f2
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GPG Key ID: F4C1D3917EACEE93
2 changed files with 6 additions and 4 deletions
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3
guix/scripts/pack.scm
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@ -1,5 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
@ -59,7 +60,7 @@
(compressor "lzip" "lz"
#~(#+(file-append lzip "/bin/lzip") "-9"))
(compressor "xz" "xz"
#~(#+(file-append xz "/bin/xz") "-e"))
#~(#+(file-append xz "/bin/xz") "-e -T0"))
(compressor "bzip2" "bz2"
#~(#+(file-append bzip2 "/bin/bzip2") "-9"))))

7
guix/utils.scm
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@ -5,6 +5,7 @@
;;; Copyright © 2014 Ian Denhardt <ian@zenhack.net>
;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
@ -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))))
@ -164,7 +165,7 @@ a symbol such as 'xz."
(match compression
((or #f 'none) (values input '()))
('bzip2 (filtered-port `(,%bzip2 "-c") input))
('xz (filtered-port `(,%xz "-c") input))
('xz (filtered-port `(,%xz "-c -T0") input))
('gzip (filtered-port `(,%gzip "-c") input))
(else (error "unsupported compression scheme" compression))))
@ -221,7 +222,7 @@ program--e.g., '(\"--fast\")."
(match compression
((or #f 'none) (values output '()))
('bzip2 (filtered-output-port `(,%bzip2 "-c" ,@options) output))
('xz (filtered-output-port `(,%xz "-c" ,@options) output))
('xz (filtered-output-port `(,%xz "-c -T0" ,@options) output))
('gzip (filtered-output-port `(,%gzip "-c" ,@options) output))
(else (error "unsupported compression scheme" compression))))