[Bug 570805] Re: [regression] dpkg fsync cause massive regression in Ubuntu Server and Alternate installation times

[Jakob Unterwurzacher]

Test on ext3 (Karmic upgraded to Lucid), 5400rpm notebook hd. Note that
i think in addition to dropping the caches, we have to sync before
running the test to get somewhat stable results.

Commands used (as root):
  sync; echo 3 > /proc/sys/vm/drop_caches; time dpkg -i /var/cache/apt/archives/openoffice.org-common_1%3a3.2.0-7ubuntu4_all.deb | ts
  sync; echo 3 > /proc/sys/vm/drop_caches; time dpkg -i /var/cache/apt/archives/ubuntu-docs_10.04.3_all.deb | ts

Results, old dpkg (1.15.5.6ubuntu4):
  openoffice.org-common: 26s unpack, 93s real
  ubuntu-docs:           24s unpack, 51s real

Results, Colin's PPA dpkg (1.15.5.6ubuntu5~ppa1):
  openoffice.org-common: 31s unpack, 94s real
  ubuntu-docs:           23s unpack, 54s real

So ext3 doesn't care at all - it's not regressing at least.

-- 
[regression] dpkg fsync cause massive regression in Ubuntu Server and Alternate installation times
https://bugs.launchpad.net/bugs/570805
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