[Bug 601299] Re: maverick btrfs slow install

[Ken Bloom]

I did a related benchmark on a Debian unstable system (with dpkg
1.15.8.5 and linux-image-2.6.35-trunk-amd64) and an ext3/4 file system.
Here were the results:

This affects my ext3/4 filesystem (ext3 mounted with the ext4 driver,
but none of the advanced ext4 features enabled) as well. Iin a
cowbuilder chroot (with all of the packages pre-cached by apt-cacher-
ng):

      # time eatmydata apt-get install –no-install-recommends openoffice.org
      0 upgraded, 142 newly installed, 0 to remove and 0 not upgraded.
      …
      real 0m57.682s
      user 0m37.030s
      sys 0m7.220s

      # time apt-get install –no-install-recommends openoffice.org
      0 upgraded, 142 newly installed, 0 to remove and 0 not upgraded.
      …
      real 3m17.158s
      user 0m37.186s
      sys 0m11.057s

Over three times as long. So maybe you're getting a double hit with
btrfs, but the first hit that dpkg is giving you on *any* filesystem is
pretty bad to begin with.

-- 
maverick btrfs slow install
https://bugs.launchpad.net/bugs/601299
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