Ubuntu
dpkg package

  1. Bug #601299
  2. Comment #26

Comment 26 for bug 601299

Revision history for this message
Ken Bloom (kbloom) wrote : Re: maverick btrfs slow install

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.