[SCM] guix source archive branch, master, updated. v0.1-241-gd808559

[Ludovic Courtès]

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commit d80855999a81f344ca0c994f0532f5bd45162089
Author: Ludovic Courtès <address@hidden>
Date:   Sat Mar 16 16:46:46 2013 +0100

    derivations: Optimize `write-derivation'.
    
    This reduces the execution time of
    "guix build -e '(@ (gnu packages emacs) emacs)' -d" by 25%, from
    1.54 s. to 1.15s.
    
    * guix/derivations.scm (write-sequence, write-list, write-tuple): New
      procedures.
      (write-derivation)[list->string, write-list]: Remove.
      [write-string-list, write-output, write-input, write-env-var]: New 
helpers.
      Rewrite in terms of these new helpers.

-----------------------------------------------------------------------

Summary of changes:
 guix/derivations.scm |  106 +++++++++++++++++++++++++++++++++++---------------
 1 files changed, 74 insertions(+), 32 deletions(-)


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