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| author | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-06-29 14:26:31 -0400 |
|---|---|---|
| committer | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-06-29 15:24:52 -0400 |
| commit | 4911a10a4e51102a21a5d123a852c75d2ec92dbc (patch) | |
| tree | 6e02ca6d92cc037efc89801960f4997a7d54e168 /perl/lib/Nix | |
| parent | 49cd7387ad6546571ca31a41f208091b482defaa (diff) | |
| download | guix-4911a10a4e51102a21a5d123a852c75d2ec92dbc.tar.gz | |
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.
Diffstat (limited to 'perl/lib/Nix')
| -rw-r--r-- | perl/lib/Nix/Config.pm.in | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/perl/lib/Nix/Config.pm.in b/perl/lib/Nix/Config.pm.in index b6d3466518..5adc1ffba9 100644 --- a/perl/lib/Nix/Config.pm.in +++ b/perl/lib/Nix/Config.pm.in @@ -7,7 +7,8 @@ $manifestDir = $ENV{"NIX_MANIFESTS_DIR"} || "@localstatedir@/nix/manifests"; $logDir = $ENV{"NIX_LOG_DIR"} || "@localstatedir@/log/nix"; $confDir = $ENV{"NIX_CONF_DIR"} || "@sysconfdir@/nix"; -$bzip2 = $ENV{"NIX_BZIP2"} || "@bzip2@"; +$bzip2 = "@bzip2@"; +$xz = "@xz@"; $curl = "@curl@"; $useBindings = "@perlbindings@" eq "yes"; |