I'd like to revisit this bug and confirm that it occurs on both 32 and 64-bit.
When I get back home I'll do some benchmarks to see exactly what kind of 
speed-hit is occurring. Needless to say, if it's noticeable it must be 
significant.

** Description changed:

  Binary package hint: dpkg
  
  Installed using the Maverick daily build from 19th July (32 bit)
+ UPDATE: Confirmed also in release, both 64 and 32 bit
  
  Installed using a root partition formatted as BTRFS
  
- Noted that DPKG was noticeably slower and took longer for every
- operation than the same system with an ext4 partition.
+ Noted that DPKG was noticeably slower and took longer for every operation 
than the same system with an ext4 partition.
+ UPDATE: ext3, ext2 partitions are roughly the same speed as ext4. Only btrfs 
is slower.
  
  Examples of slowness include:
- * apt-get update takes a very long time
- * Installing packages takes 2 to 3 times as long as on ext4
- * Particularly unpacking the deb file, this takes the longest
+ * apt-get update takes a very long time, particularly at the end after 
downloading the package lists
+ * Installing packages takes 2 to 3 times as long as on ext4/3/2
+ * Particularly unpacking the deb file, this takes the longest. Basically any 
IO operations are slower.

-- 
DPKG is very slow when using BTRFS
https://bugs.launchpad.net/bugs/607632
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