mdebray/tvl-depot
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5 commits

Author SHA1 Message Date
Eelco Dolstra
46f852cda0 Use a GNU tar flag to shut up warnings about implausibly old timestamp 2012-08-01 16:42:51 -04:00
Eelco Dolstra
04559a0d45 Merge branch 'master' of github.com:NixOS/nix into no-manifests 2012-07-11 18:53:27 -04:00
Shea Levy
40c01ec467 corepkgs/config.nix.in: We'll need curl 2012-07-09 15:29:49 -04:00
Eelco Dolstra
4911a10a4e Use XZ compression in binary caches 
XZ compresses significantly better than bzip2.  Here are the
compression ratios and execution times (using 4 cores in parallel) on
my /var/run/current-system (3.1 GiB):

  bzip2: total compressed size 849.56 MiB, 30.8% [2m08]
  xz -6: total compressed size 641.84 MiB, 23.4% [6m53]
  xz -7: total compressed size 621.82 MiB, 22.6% [7m19]
  xz -8: total compressed size 599.33 MiB, 21.8% [7m18]
  xz -9: total compressed size 588.18 MiB, 21.4% [7m40]

Note that compression takes much longer.  More importantly, however,
decompression is much faster:

  bzip2: 1m47.274s
  xz -6: 0m55.446s
  xz -7: 0m54.119s
  xz -8: 0m52.388s
  xz -9: 0m51.842s

The only downside to using -9 is that decompression takes a fair
amount (~65 MB) of memory.
 2012-06-29 15:24:52 -04:00
Eelco Dolstra
9b7df1ef00 * Forgot to add. 2012-01-03 09:19:40 +00:00